부산대학교 도서관

Ashton NJ; Department of Psychiatry and Neurochemistry, Institute of Neuroscience & Physiology, the Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.; King's College London, Institute of Psychiatry, Psychology and Neuroscience Maurice Wohl Institute Clinical Neuroscience Institute London, UK.; NIHR Biomedical Research Centre for Mental Health and Biomedical Research Unit for Dementia at South London and Maudsley NHS Foundation London, UK.; Centre for Age-Related Medicine, Stavanger University Hospital, Stavanger, Norway.; Keshavan A; Dementia Research Centre, UCL Queen Square Institute of Neurology, University College London, London, UK.; Brum WS; Department of Psychiatry and Neurochemistry, Institute of Neuroscience & Physiology, the Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.; Graduate Program in Biological Sciences: Biochemistry, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil.; Andreasson U; Department of Psychiatry and Neurochemistry, Institute of Neuroscience & Physiology, the Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.; Arslan B; Department of Psychiatry and Neurochemistry, Institute of Neuroscience & Physiology, the Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.; Droescher M; AbbVie Deutschland GmbH & Co. KG, Neuroscience Research, Knollstrasse, 67061 Ludwigshafen, Germany.; Barghorn S; AbbVie Deutschland GmbH & Co. KG, Neuroscience Research, Knollstrasse, 67061 Ludwigshafen, Germany.; Vanbrabant J; ADx NeuroSciences N.V., Technologiepark 6, 9052 Ghent, Belgium.; Lambrechts C; ADx NeuroSciences N.V., Technologiepark 6, 9052 Ghent, Belgium.; Van Loo M; ADx NeuroSciences N.V., Technologiepark 6, 9052 Ghent, Belgium.; Stoops E; ADx NeuroSciences N.V., Technologiepark 6, 9052 Ghent, Belgium.; Iyengar S; Alamar Biosciences, Inc., Fremont, CA, USA.; Ji H; Alamar Biosciences, Inc., Fremont, CA, USA.; Xu X; Alamar Biosciences, Inc., Fremont, CA, USA.; Forrest-Hay A; Alamar Biosciences, Inc., Fremont, CA, USA.; Zhang B; Alamar Biosciences, Inc., Fremont, CA, USA.; Luo Y; Alamar Biosciences, Inc., Fremont, CA, USA.; Jeromin A; ALZpath Inc., Carlsbad, CA, USA.; Vandijck M; Fujirebio Europe N.V., Ghent, Belgium.; Bastard NL; Fujirebio Europe N.V., Ghent, Belgium.; Kolb H; Enigma Biomedical Group, CA, USA.; Triana-Baltzer G; Neuroscience Biomarkers, Janssen Research and Development, La Jolla, California, USA.; Bali D; Clinical Memory Research Unit, Department of Clinical Sciences, Lund University, Lund 22184, Sweden.; Janelidze S; Clinical Memory Research Unit, Department of Clinical Sciences, Lund University, Lund 22184, Sweden.; Yang SY; MagQu Co., Ltd., New Taipei City 112, Taiwan.; Demos C; Meso Scale Diagnostics, LLC., Rockville, Maryland, USA.; Romero D; Meso Scale Diagnostics, LLC., Rockville, Maryland, USA.; Sigal G; Meso Scale Diagnostics, LLC., Rockville, Maryland, USA.; Wohlstadter J; Meso Scale Diagnostics, LLC., Rockville, Maryland, USA.; Malyavantham K; Quanterix Corp, Billerica, MA, USA.; Khare M; Quanterix Corp, Billerica, MA, USA.; Jethwa A; Roche Diagnostics GmbH, Penzberg, Germany.; Stoeckl L; Roche Diagnostics GmbH, Penzberg, Germany.; Gobom J; Department of Psychiatry and Neurochemistry, Institute of Neuroscience & Physiology, the Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.; Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden.; Kac PR; Department of Psychiatry and Neurochemistry, Institute of Neuroscience & Physiology, the Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.; Gonzalez-Ortiz F; Department of Psychiatry and Neurochemistry, Institute of Neuroscience & Physiology, the Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.; Montoliu-Gaya L; Department of Psychiatry and Neurochemistry, Institute of Neuroscience & Physiology, the Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.; Hansson O; Clinical Memory Research Unit, Department of Clinical Sciences, Lund University, Lund 22184, Sweden.; Memory Clinic, Skåne University Hospital, Malmö 20502, Sweden.; Rissman RA; Alzheimer's Therapeutic Research Institute, Keck School of Medicine of the University of Southern California, San Diego, CA 92121, USA.; Carillo MC; Division of Medical & Scientific Relations, Alzheimer's Association, Chicago, Illinois, USA.; Shaw LM; Department of pathology & laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104.; Blennow K; Department of Psychiatry and Neurochemistry, Institute of Neuroscience & Physiology, the Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.; Memory Clinic, Skåne University Hospital, Malmö 20502, Sweden.; Paris Brain Institute, ICM, Pitié-Salpêtrière Hospital, Sorbonne University, Paris, France.; Neurodegenerative Disorder Research Center, Division of Life Sciences and Medicine, and Department of Neurology, Institute on Aging and Brain Disorders, University of Science and Technology of China and First Affiliated Hospital of USTC, Hefei, P.R. China.; Schott JM; Dementia Research Centre, UCL Queen Square Institute of Neurology, University College London, London, UK.; UK Dementia Research Institute, University College London, London, UK.; Zetterberg H; Department of Psychiatry and Neurochemistry, Institute of Neuroscience & Physiology, the Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.; Memory Clinic, Skåne University Hospital, Malmö 20502, Sweden.; UK Dementia Research Institute, University College London, London, UK.; Department of Neurodegenerative Disease, UCL Institute of Neurology, Queen Square, London, UK.; Hong Kong Center for Neurodegenerative Diseases, Science Park, Hong Kong, China.; School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, USA.

Country of Publication: United States NLM ID: 101767986 Publication Model: Electronic Cited Medium: Internet NLM ISO Abbreviation: medRxiv Subsets: PubMed not MEDLINE

Yorker, J.G.; Jeromin, L.S.; Lee, D.L.Y.; Palecki, E.F.; Golden, K.P.; Jing, Z.

In: Proceedings of SPIE - The International Society for Optical Engineering. (Proceedings of SPIE - The International Society for Optical Engineering, 2002, 4682:21-29)

Lee, D.L.Y.; Golden, K.P.; Yorker, J.G.; Davis, J.; Rodricks, B.G.; Cheung, L.K.; Jeromin, L.S.

In: Journal of X-Ray Science and Technology, Clinical Applications of Modern Imaging Technology. (Journal of X-Ray Science and Technology, 2002, 10(1-2):17-36)

Lee, D.L.; Rodricks, B.; Hoffberg, M.G.; Williams, C.L.; Golden, K.P.; Jeromin, L.S.

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Lee, D.L.Y.; Golden, K.P.; Yorker, J.G.; Rodricks, B.G.; Cheung, L.K.; Jeromin, L.S.

In: Proceedings of SPIE - The International Society for Optical Engineering. (Proceedings of SPIE - The International Society for Optical Engineering, 2001, 4508:1-14)

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Speiser, R.C.; Zanrosso, E.M.; Jeromin, L.S.; Carlson, R.A.

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Gratt, B.M.; Sickles, E.A.; Gould, R.G.; Jeromin, L.S.; White, S.C.

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Gratt, B.M.; White, S.C.; Sickles, E.A.; Jeromin, L.S.

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Hufe, M.J.; Bell, J.H.; Wolff, D.P.; Jeromin, L.S.

In: Proceedings of SPIE - The International Society for Optical Engineering, Medical Imaging 1998: PACS Design and Evaluation: Engineering and Clinical Issues. (Proceedings of SPIE - The International Society for Optical Engineering, 1998, 3339:237-246)

Den Boer, W.; Aggas, S.; Byun, Y.H.; Gu, T.; Zhong, J.Z.Z.; Thomsen, S.V.; Jeromin, L.S.; Lee, D.L.Y.

In: Proceedings of SPIE - The International Society for Optical Engineering. (Proceedings of SPIE - The International Society for Optical Engineering, 1998, 3336:520-528)

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In: Proceedings of SPIE - The International Society for Optical Engineering, Medical Imaging 1997: Physics of Medical Imaging. (Proceedings of SPIE - The International Society for Optical Engineering, 1997, 3032:88-96)

Gill, Jessica; Latour, Lawrence; Diaz-Arrastia, Ramon; Motamedi, Vida; Turtzo, Christine; Shahim, Pashtun; Mondello, Stefania; DeVoto, Christina; Veras, Eliseo; Hanlon, David; Song, Linan; Jeromin, Andreas

Neurology. Oct 09, 2018 91(15):e1385-e1389

Mattsson, Niklas; Zetterberg, Henrik; Janelidze, Shorena; Insel, Philip S.; Andreasson, Ulf; Stomrud, Erik; Palmqvist, Sebastian; Baker, David; Hehir, Cristina A. Tan; Jeromin, Andreas; Hanlon, David; Song, Linan; Shaw, Leslie M.; Trojanowski, John Q.; Weiner, Michael W.; Hansson, Oskar; Blennow, Kaj; Tan Hehir, Cristina A; ADNI Investigators (CORPORATE AUTHOR)

Neurology. 10/25/2016, Vol. 87 Issue 17, p1827-1835. 9p.

Rojas JC; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy. jrojasmartinez@memory.ucsf.edu.; Wang P; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Staffaroni AM; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Heller C; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Cobigo Y; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Wolf A; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Goh SM; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Ljubenkov PA; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Heuer HW; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Fong JC; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Taylor JB; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Veras E; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Song L; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Jeromin A; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Hanlon D; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Yu L; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Khinikar A; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Sivasankaran R; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Kieloch A; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Valentin MA; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Karydas AM; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Mitic LL; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Pearlman R; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Kornak J; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Kramer JH; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Miller BL; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Kantarci K; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Knopman DS; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Graff-Radford N; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Petrucelli L; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Rademakers R; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Irwin DJ; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Grossman M; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Ramos EM; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Coppola G; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Mendez MF; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Bordelon Y; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Dickerson BC; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Ghoshal N; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Huey ED; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Mackenzie IR; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Appleby BS; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Domoto-Reilly K; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Hsiung GR; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Toga AW; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Weintraub S; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Kaufer DI; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Kerwin D; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Litvan I; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Onyike CU; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Pantelyat A; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Roberson ED; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Tartaglia MC; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Foroud T; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Chen W; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Czerkowicz J; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Graham DL; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; van Swieten JC; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Borroni B; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Sanchez-Valle R; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Moreno F; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Laforce R; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Graff C; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Synofzik M; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Galimberti D; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Rowe JB; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Masellis M; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Finger E; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Vandenberghe R; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; de Mendonça A; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Tagliavini F; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Santana I; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Ducharme S; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Butler CR; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Gerhard A; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Levin J; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Danek A; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Otto M; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Sorbi S; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Cash DM; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Convery RS; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Bocchetta M; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Foiani M; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Greaves CV; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Peakman G; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Russell L; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Swift I; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Todd E; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Rohrer JD; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Boeve BF; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Rosen HJ; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.; Boxer AL; From the University of California, San Francisco (J.C.R., P.W., A.M.S., Y.C., A.W., S.-Y.M.G., P.A.L., H.W.H., J.C.F., J.B.T., A.M.K., L.L.M., J.K., J.H.K., B.L.M., H.J.S., A.L.B.); UK Dementia Research Centre (C.H., D.M.C., R.S.C., M.B., M.F., C.V.G., G.P., L.R., I.S., E.T., J.D.R.), UCL Institute of Neurology, Queen Square, London; Quanterix Corp (E.V., L.S., A.J., D.H.), Lexington; Novartis Institutes for Biomedical Research Inc (L.Y., A. Khinikar, R.S.), Cambridge, MA; Novartis Pharma AG (A. Kieloch, M.-A.V.), Basel, Switzerland; Bluefield Project to Cure Frontotemporal Dementia (L.L.M., R.P.), San Francisco, CA; Mayo Clinic (K.K., D.S.K., B.F.B.), Rochester, MN; Mayo Clinic (N.G.-R., L.P., R.R.), Jacksonville, FL; University of Pennsylvania (D.J.I., M.G.), Philadelphia; University of California, Los Angeles (E.M.R., G.C., M.F.M., Y.B.); Harvard University/Massachusetts General Hospital (B.D.C.), Boston, MA; Washington University (N.G.), St. Louis, MO; Columbia University (E.D.H.), New York, NY; University of British Columbia (I.R.M., G.-Y.R.H.), Vancouver, Canada; Case Western Reserve University (B.S.A.), Cleveland, OH; University of Washington (K.D.-R.), Seattle; Laboratory of Neuroimaging (A.W.T.), University of Southern California, Los Angeles; Northwestern University (S.W.), Chicago, IL; University of North Carolina (D.I.K.), Chapel Hill; Texas Health Presbyterian Hospital Dallas (D.K.); University of California, San Diego (I.L.); Johns Hopkins Hospital (C.U.O., A.P.), Baltimore, MD; University of Alabama at Birmingham (E.D.R.); University of Toronto (M.C.T., M.M.), Ontario, Canada; Indiana University School of Medicine (T.F.), Indianapolis; Biogen Inc (W.C., J.C., D.L.G.), Cambridge, MA; Erasmus Medical Centre (J.C.v.S.), Rotterdam, the Netherlands; University of Brescia (B.B.), Italy; University of Barcelona (R.S.-V.); Donostia University Hospital (F.M.), San Sebastian, Gipuzkoa, Spain; Clinique Interdisciplinaire de Mémoire (R.L.), Département des Sciences Neurologiques, CHU de Québec; Faculté de Médecine (R.L.), Université Laval, Quebec, Canada; Center for Alzheimer Research (C.G.), Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet; Unit for Hereditary Dementias (C.G.), Theme Aging, Karolinska University Hospital, Solna, Sweden; University of Tübingen (M.S.); Center for Neurodegenerative Diseases (DZNE) (M.S.), Tübingen, Germany; Fondazione IRCCS Ospedale Policlinico (D.G.); University of Milan (D.G.), Centro Dino Ferrari, Italy; Department of Clinical Neurosciences and Cambridge University Hospital (J.B.R.), University of Cambridge, UK; University of Western Ontario (E.F.), London, Canada; KU Leuven (R.V.), Belgium; Neurology Service (R.V.), University Hospitals Leuven, Belgium; University of Lisbon (A.d.M.), Portugal; Fondazione IRCCS Istituto Neurologico Carlo Besta (F.T.), Milan, Italy; University of Coimbra (I.S.), Portugal; McGill University (S.D.), Montreal, Québec, Canada; University of Oxford (C.R.B.); Wolfson Molecular Imaging Centre (A.G.), University of Manchester, UK; University of Duisburg-Essen (A.G.), Duisberg; Ludwig-Maximilians-Universität München (J.L., A.D.); German Center for Neurodegenerative Diseases (J.L.), Munich Cluster for Systems Neurology (SyNergy); University of Ulm (M.O.), Germany; and Department of Neuroscience, Psychology, Drug Research and Child Health (S.S.), University of Florence, and IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.

Publisher: Lippincott Williams & Wilkins Country of Publication: United States NLM ID: 0401060 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1526-632X (Electronic) Linking ISSN: 00283878 NLM ISO Abbreviation: Neurology Subsets: MEDLINE

Walsh RR; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ. Ryan.Walsh@BarrowNeuro.org.; Krismer F; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Galpern WR; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Wenning GK; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Low PA; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Halliday G; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Koroshetz WJ; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Holton J; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Quinn NP; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Rascol O; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Shaw LM; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Eidelberg D; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Bower P; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Cummings JL; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Abler V; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Biedenharn J; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Bitan G; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Brooks DJ; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Brundin P; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Fernandez H; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Fortier P; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Freeman R; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Gasser T; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Hewitt A; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Höglinger GU; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Huentelman MJ; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Jensen PH; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Jeromin A; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Kang UJ; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Kaufmann H; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Kellerman L; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Khurana V; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Klockgether T; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Kim WS; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Langer C; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; LeWitt P; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Masliah E; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Meissner W; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Melki R; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Ostrowitzki S; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Piantadosi S; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Poewe W; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Robertson D; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Roemer C; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Schenk D; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Schlossmacher M; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Schmahmann JD; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Seppi K; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Shih L; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Siderowf A; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Stebbins GT; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Stefanova N; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Tsuji S; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Sutton S; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.; Zhang J; From Muhammad Ali Parkinson Center (R.R.W.), Barrow Neurological Institute, Phoenix, AZ; Department of Neurology (F.K., G.K.W., W.P., K.S., N.S.), Medical University Innsbruck, Austria; National Institute of Neurological Disorders and Stroke (W.R.G., W.J.K.), NIH, Bethesda, MD; Department of Neurology (P.A.L.), Mayo Clinic, Rochester, MN; Brain and Mind Centre (G.H.), Sydney Medical School, the University of Sydney; UNSW Medicine & Neuroscience Research Australia (G.H.), Sydney; Queen Square Brain Bank (J.H.), UCL Institute of Neurology (N.P.Q.), London, UK; UPS, INSERM, and CHU de Toulouse (O.R.), University de Toulouse; Centre de Référence Maladie Rare contre l'AMS (O.R.), Centre d'Investigation Clinique CIC1436, Départments de Pharmacologie Clinique et de Neurosciences, NeuroToul/COEN Center of Excellence in Neurodegeneration, Toulouse, France; Department of Pathology & Laboratory Medicine (L.M.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; Center for Neurosciences (D.E.), The Feinstein Institute for Medical Research, Manhasset, NY; The Multiple System Atrophy (MSA) Coalition, Inc. (P. B., J.B., P.F., L.K., C.L., C.R., S.S.), Charlotte, NC; Cleveland Clinic Lou Ruvo Center for Brain Health (J.L.C.), Las Vegas, NV; Medical Affairs (V.A.), Teva Pharmaceuticals, Frazer, PA; Department of Neurology (G.B.), David Geffen School of Medicine, Brain Research Institute, and Molecular Biology Institute, University of California at Los Angeles; Institute of Neurology (D.J.B.), University of Newcastle upon Tyne, UK; Van Andel Research Institute (P. Brundin), Center for Neurodegenerative Science, Grand Rapids, MI; Center for Neurological Restoration (H.F.), Cleveland Clinic, OH; Defeat MSA (P.F.); MSA Shoe Charity (P.F., C.R.), Saint Clair Shores, MI; Department of Neurology (R.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Department of Neurodegenerative Diseases (T.G.), Hertie Institute of Clinical Brain Research, University of Tübingen; German Center for Neurodegenerative Diseases (DZNE) (T.G.), Tübingen, Germany; Lundbeck LLC (A.H.), Deerfield, IL; German Center for Neurodegenerative Diseases (DZNE) (G.U.H.), Munich; Department of Neurology (G.U.H.), Technical University of Munich, Germany; Neurogenomics Division (M.J.H.), The Translational Genomics Research Institute, Phoenix, AZ; Dandrite & Department of Biomedicine (P.H.J.), Aarhus University, Denmark; Quanterix (A.J.), Lexington, MA; Department of Neurology (U.J.K.), Columbia University Medical Center; Department of Neurology (H.K.), New York University School of Medicine, New York; Whitehead Institute for Biomedical Research (V.K.), Cambridge; Ann Romney Center for Neurologic Disease (V.K.), Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston; Harvard Stem Cell Institute (V.K.), Cambridge, MA; Department of Neurology (T.K.), University of Bonn; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Bonn, Germany; Brain and Mind Centre (W.S.K.), Sydney Medical School, University of Sydney, Australia; Department of Neurology (P.L.), Henry Ford Hospital; Department of Neurology (P.L.), Wayne State University School of Medicine, Detroit, MI; Division of Neurosciences (E.M.), National Institute on Aging/NIH, Bethesda, MD; Centre de Référence Maladie Rare AMS (W.M.), Hôpital Pellegrin, CHU de Bordeaux; Université de Bordeaux (W.M.), Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux; Paris Saclay Institute of Neuroscience (R.M.), CNRS, Gif-sur-Yvette, France; Genentech Inc. (S.O.), South San Francisco; Cedars-Sinai Medical Center (S.P.), Los Angeles, CA; Department of Neurology (D.R.), Vanderbilt University Medical Center, Nashville, TN; MSA NJ (C.R.), Howell, NJ; Prothena Biosciences (D.S.), South San Francisco, CA; Division of Neurology (M.S.), Department of Medicine, The Ottawa Hospital, Canada; Department of Neurology (J.D.S.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Cure MSA Foundation (L.S.), Fremont, CA; Avid Radiopharmaceuticals (A.S.), Philadelphia, PA; Department of Neurological Sciences (G.T.S.), Rush University Medical Center, Chicago, IL; Department of Neurology (S.T.), Graduate School of Medicine, Tokyo University, Tokyo, Japan; and University of Washington (J.Z.), Seattle. W.R.G. is currently affiliated with Janssen Research and Development, Titusville, NJ.

Publisher: Lippincott Williams & Wilkins Country of Publication: United States NLM ID: 0401060 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1526-632X (Electronic) Linking ISSN: 00283878 NLM ISO Abbreviation: Neurology