부산대학교 도서관

Hanna, Michael G ; Badrising, Umesh A ; Benveniste, Olivier ; Lloyd, Thomas E ; Needham, Merrilee ; Chinoy, Hector ; Aoki, Masashi ; Machado, Pedro M ; Liang, Christina ; Reardon, Katrina A ; de Visser, Marianne ; Ascherman, Dana P ; Barohn, Richard J ; Dimachkie, Mazen M ; Miller, James A L ; Kissel, John T ; Oskarsson, Björn ; Joyce, Nanette C ; Van den Bergh, Peter ; Baets, Jonathan ; De Bleecker, Jan L ; Karam, Chafic ; David, William S ; Mirabella, Massimiliano ; Nations, Sharon P ; Jung, Hans H ; Pegoraro, Elena ; Maggi, Lorenzo ; Rodolico, Carmelo ; Filosto, Massimiliano ; Shaibani, Aziz I ; Sivakumar, Kumaraswamy ; Goyal, Namita A ; Mori-Yoshimura, Madoka ; Yamashita, Satoshi ; Suzuki, Naoki ; Katsuno, Masahisa ; Murata, Kenya ; Nodera, Hiroyuki ; Nishino, Ichizo ; Romano, Carla D ; Williams, Valerie S L ; Vissing, John ; Auberson, Lixin Zhang ; Wu, Min ; de Vera, Ana ; Papanicolaou, Dimitris A ; Amato, Anthony A

In The Lancet Neurology September 2019 18(9):834-844

Williams VSL; RTI Health Solutions, 200 Park Offices Drive, Research Triangle Park, NC 27709, USA, Phone: +1.919.316.3820, Fax: +1.919.541.7222.; Soliman AM; AbbVie, North Chicago, IL, USA.; Barrett AM; RTI Health Solutions, Research Triangle Park, NC, USA.; Klein KO; Rady Children's Hospital and University of California, San Diego, CA, USA.

Publisher: Walter de Gruyter Country of Publication: Germany NLM ID: 9508900 Publication Model: Print Cited Medium: Internet ISSN: 2191-0251 (Electronic) Linking ISSN: 0334018X NLM ISO Abbreviation: J Pediatr Endocrinol Metab Subsets: MEDLINE

Kolotkin RL; Quality of Life Consulting, Durham, North Carolina, USA.; Department of Family Medicine and Community Health, Duke University School of Medicine, Durham, North Carolina, USA.; Faculty of Health and Social Sciences, Western Norway University of Applied Sciences, Førde, Norway.; Centre of Health Research, Førde Hospital Trust, Førde, Norway.; Morbid Obesity Centre, Vestfold Hospital Trust, Tønsberg, Norway.; Williams VSL; Department of Patient Reported Outcomes, RTI Health Solutions, Research Triangle Park, North Carolina, USA.; von Huth Smith L; Novo Nordisk A/S, Søborg, Denmark.; Meincke HH; Novo Nordisk A/S, Søborg, Denmark.; Qin S; Department of Patient Reported Outcomes, RTI Health Solutions, Research Triangle Park, North Carolina, USA.; Williams N; Department of Patient Reported Outcomes, RTI Health Solutions, Research Triangle Park, North Carolina, USA.; Fehnel SE; Department of Patient Reported Outcomes, RTI Health Solutions, Research Triangle Park, North Carolina, USA.

Publisher: Wiley-Blackwell Country of Publication: England NLM ID: 101560587 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1758-8111 (Electronic) Linking ISSN: 17588103 NLM ISO Abbreviation: Clin Obes Subsets: MEDLINE

Amato AA; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL. aamato@bwh.harvard.edu.; Hanna MG; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Machado PM; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Badrising UA; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Chinoy H; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Benveniste O; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Karanam AK; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Wu M; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Tankó LB; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Schubert-Tennigkeit AA; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Papanicolaou DA; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Lloyd TE; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Needham M; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Liang C; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Reardon KA; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; de Visser M; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Ascherman DP; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Barohn RJ; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Dimachkie MM; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Miller JAL; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Kissel JT; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Oskarsson B; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Joyce NC; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Van den Bergh P; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Baets J; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; De Bleecker JL; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Karam C; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; David WS; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Mirabella M; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Nations SP; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Jung HH; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Pegoraro E; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Maggi L; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Rodolico C; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Filosto M; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Shaibani AI; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Sivakumar K; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Goyal NA; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Mori-Yoshimura M; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Yamashita S; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Suzuki N; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Aoki M; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Katsuno M; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Morihata H; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Murata K; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Nodera H; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Nishino I; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Romano CD; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Williams VSL; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Vissing J; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.; Zhang Auberson L; From the Department of Neurology (A.A.A.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; Medical Research Council Centre for Neuromuscular Diseases (M.G.H., P.M.M.) and Institute of Neurology, Department of Neuromuscular Diseases & Centre for Rheumatology (P.M.M.), University College London; Department of Rheumatology & Queen Square Centre for Neuromuscular Diseases (P.M.M.), University College London Hospitals NHS Foundation Trust; Department of Rheumatology (P.M.M.), Northwick Park Hospital, London North West University Healthcare NHS Trust, UK; Department of Neurology (U.A.B.), Leiden University Medical Center, Netherlands; National Institute for Health Research Manchester Biomedical Research Centre (H.C.), Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, UK; Department of Internal Medicine and Clinical Immunology (O.B.), Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Novartis Healthcare Pvt. Ltd. (K.A.K), Hyderabad, India; Novartis Pharmaceuticals (M.W., D.A.P.), East Hanover, NJ; Novartis Pharma AG (L.B.T., A.A.S-T.), Basel, Switzerland; Department of Neurology (T.E.L.), The Johns Hopkins University School of Medicine, Baltimore, MD; Institute for Immunology & Infectious Diseases (M.N.), Fiona Stanley Hospital, Murdoch University and Notre Dame University, Perth; Department of Neurology (C.L.), Royal North Shore Hospital, New South Wales; Calvary Health Care Bethlehem (K.A.R.), Caulfield South, Australia; Department of Neurology (M.d.V), Amsterdam University Medical Centre, the Netherlands; Department of Medicine (D.P.A.), University of Miami, FL; Department of Neurology (R.J.B., M.M.D.), University of Kansas Medical Center, Kansas City; Department of Neurology (J.A.L.M.), Newcastle upon Tyne Hospitals NHS Foundation Trust, UK; Department of Neurology (J.T.K.), The Ohio State University Wexner Medical Center, Columbus; Neuromuscular Research Center (B.O., N.C.J.), UC Davis School of Medicine, Sacramento, CA; Department of Neurology (P.V.d.B.), University Hospital Saint-Luc, University of Louvain, Brussels; Neuromuscular Reference Centre, Department of Neurology (J.B.), Antwerp University Hospital; Institute Born-Bunge (J.B.), University of Antwerp; Department of Neurology (J.L.d.B.), Ghent University Hospital, Belgium; Department of Neurology (C.K.), Oregon Health & Science University, Portland; Department of Neurology (W.S.D.), Massachusetts General Hospital, Neuromuscular Diagnostic Center and Electromyography Laboratory, Boston; Department of Neurology (M.M.), Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Università Cattolica del Sacro Cuore (M.M.), Rome, Italy; Department of Neurology (S.P.N.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (H.H.J.), University Hospital and University of Zurich, Switzerland; Department of Neurosciences (E.P.), University of Padova School of Medicine; Fondazione IRCCS Istituto Neurologico Carlo Besta (L.M.), Milan; Unit of Neurology and Neuromuscular Disorders (C.R.), Azienda Ospedaliera Universitaria Policlinico G Martino, University of Messina; Center for Neuromuscular Diseases (M.F.), Unit of Neurology, ASST Spedali Civili and University of Brescia, Italy; Nerve and Muscle Center of Texas (A.I.S.), Houston; Neuromuscular Research Center (K.S.), Phoenix, AZ; Department of Neurology (N.A.G.), ALS & Neuromuscular Center, University of California Irvine, Orange; Department of Neurology (M.M.-Y.), National Center Hospital, National Center of Neurology and Psychiatry, Tokyo; Department of Neurology (S.Y.), Kumamoto University Hospital; Department of Neurology (N.S.), Tohoku University Hospital, Miyagi; Department of Neurology (M.A.), Tohoku University School of Medicine, Sendai; Department of Neurology (M.K.), Nagoya University Hospital, Aichi; Department of Neurology (H.M.), Osaka City General Hospital; Wakayama Medical University Hospital (K.M.); Tokushima University Hospital (H.N.); Department of Neuromuscular Research (I.N.), National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan; RTI Health Solutions (C.D.R., V.S.L.W.), Research Triangle Park, NC; Copenhagen Neuromuscular Center (J.V.), Rigshospitalet, University of Copenhagen, Denmark; and UCB (L.Z.A.), Bulle, Switzerland. H.N. is currently affiliated with the Department of Neurology, Kanazawa Medical University, Ishikawa, Japan. B.O. is currently affiliated with the Department of Neurology, Mayo Clinic, Jacksonville, FL.

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

Deal LS; Williams VS; Dibenedetti DB; Fehnel SE; Deal, Linda S; Williams, Valerie S L; DiBenedetti, Dana Britt; Fehnel, Sheri E

Quality of Life Research (QUAL LIFE RES), Aug2010; 19(6): 899-905. (7p)

Deal LS; Wyeth Research, Collegeville, PA, USA. linda_deal@yahoo.com; Williams VS; Fehnel SE

Publisher: Adis, Springer International Country of Publication: New Zealand NLM ID: 101309314 Publication Model: Print Cited Medium: Print ISSN: 1178-1653 (Print) Linking ISSN: 11781653 NLM ISO Abbreviation: Patient Subsets: MEDLINE

Williams VS; RTI Health Solutions, 3040 Cornwallis Road, Research Triangle Park, NC 27707, USA. vwilliams@rti.org; Morlock RJ; Feltner D

Publisher: BioMed Central Country of Publication: England NLM ID: 101153626 Publication Model: Electronic Cited Medium: Internet ISSN: 1477-7525 (Electronic) Linking ISSN: 14777525 NLM ISO Abbreviation: Health Qual Life Outcomes Subsets: MEDLINE

Kolotkin RL; Quality of Life Consulting, PLLC, Durham, North Carolina.; Department of Family Medicine and Community Health, Duke University School of Medicine, Durham, North Carolina.; Faculty of Health and Social Sciences, Western Norway University of Applied Sciences, Førde, Norway.; Centre of Health Research, Førde Hospital Trust, Førde, Norway.; Morbid Obesity Centre, Vestfold Hospital Trust, Tønsberg, Norway.; Williams VSL; Patient-Centered Outcomes Assessment, RTI Health Solutions, Research Triangle Park, North Carolina.; Ervin CM; Patient-Centered Outcomes Assessment, RTI Health Solutions, Research Triangle Park, North Carolina.; Williams N; Patient-Centered Outcomes Assessment, RTI Health Solutions, Research Triangle Park, North Carolina.; Meincke HH; Health Economics and Outcomes Research, Novo Nordisk A/S, Søborg, Denmark.; Qin S; Patient-Centered Outcomes Assessment, RTI Health Solutions, Research Triangle Park, North Carolina.; von Huth Smith L; Health Economics and Outcomes Research, Novo Nordisk A/S, Søborg, Denmark.; Fehnel SE; Patient-Centered Outcomes Assessment, RTI Health Solutions, Research Triangle Park, North Carolina.

Publisher: Wiley-Blackwell Country of Publication: England NLM ID: 101560587 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1758-8111 (Electronic) Linking ISSN: 17588103 NLM ISO Abbreviation: Clin Obes Subsets: MEDLINE

Chen WH; RTI Health Solutions , 3040 Cornwallis Road, P.O. Box 12194, Research Triangle Park, NC 27709 , USA.; McLeod LD; Nelson LM; Williams VS; Fehnel SE

Publisher: Taylor & Francis Country of Publication: England NLM ID: 101132257 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1744-8379 (Electronic) Linking ISSN: 14737167 NLM ISO Abbreviation: Expert Rev Pharmacoecon Outcomes Res Subsets: MEDLINE

Morlock RJ; Pfizer Inc., Global Research and Development, Ann Arbor, MI, USA. robert.morlock@biogenidec.com; Williams VS; Cappelleri JC; Harness J; Fehnel SE; Endicott J; Feltner D

Publisher: Pergamon Press Country of Publication: England NLM ID: 0376331 Publication Model: Print-Electronic Cited Medium: Print ISSN: 0022-3956 (Print) Linking ISSN: 00223956 NLM ISO Abbreviation: J Psychiatr Res Subsets: MEDLINE

Williams VS; RTI Health Solutions, Research Triangle Park, NC, 27709-2194, USA. vwilliams@rti.org; Jones G; Mauskopf J; Spalding J; DuChane J

Publisher: Mary Ann Liebert, Inc Country of Publication: United States NLM ID: 101159262 Publication Model: Print Cited Medium: Print ISSN: 1540-9996 (Print) Linking ISSN: 15409996 NLM ISO Abbreviation: J Womens Health (Larchmt) Subsets: MEDLINE

Williams VS; RTI Health Solutions, Research Triangle Park, NC 27709-2194, USA. vwilliams@rti.org; Baldwin DS; Hogue SL; Fehnel SE; Hollis KA; Edin HM

Publisher: Physicians Postgraduate Press Country of Publication: United States NLM ID: 7801243 Publication Model: Print Cited Medium: Print ISSN: 0160-6689 (Print) Linking ISSN: 01606689 NLM ISO Abbreviation: J Clin Psychiatry Subsets: MEDLINE

Williams VS; RTI Health Solutions, 3040 Cornwallis Road, PO Box 12194, Research Triangle Park, NC 27709, USA. vwilliams@rti.org; Smith MY; Fehnel SE

Publisher: Elsevier Country of Publication: United States NLM ID: 8605836 Publication Model: Print Cited Medium: Print ISSN: 0885-3924 (Print) Linking ISSN: 08853924 NLM ISO Abbreviation: J Pain Symptom Manage Subsets: MEDLINE

Santanello NC; Merck Research Laboratories, West Point, Pennsylvania 19486, USA. nancy_santanello@merck.com; Norquist JM; Nelsen LM; Williams VS; Hill CD; Bisgaard H

Publisher: Wiley-Liss Country of Publication: United States NLM ID: 8510590 Publication Model: Print Cited Medium: Print ISSN: 8755-6863 (Print) Linking ISSN: 10990496 NLM ISO Abbreviation: Pediatr Pulmonol Subsets: MEDLINE