부산대학교 도서관

Stach CM; UCB Biosciences GmbH, Monheim, Germany.; Sloan VS; UCB Biosciences Inc, Research Triangle Park, NC, USA.; Rutgers-Robert Wood Johnson Medical School, New Brunswick, NJ, USA.; Woodworth TG; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles, 1000 Veterans Ave, Los Angeles, CA, 90095, USA. tgwoodworth@me.com.; Kilgallen B; SDC, Tempe, AZ, USA.; Furst DE; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles, 1000 Veterans Ave, Los Angeles, CA, 90095, USA.; University of Washington, Seattle, WA, USA.; University of Florence, Florence, Italy.

Publisher: Adis, Springer International Country of Publication: New Zealand NLM ID: 9002928 Publication Model: Print Cited Medium: Internet ISSN: 1179-1942 (Electronic) Linking ISSN: 01145916 NLM ISO Abbreviation: Drug Saf Subsets: MEDLINE

Berthelsen DB; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Department of Rehabilitation, Municipality of Guldborgsund, Nykoebing F, Denmark.; Woodworth TG; David Geffen School of Med. Division Rheumatology. UCLA, USA.; Goel N; Duke University School of Medicine, Durham, NC, USA.; Ioannidis JPA; Departments of Medicine, Epidemiology and Population Health, Biomedical Data Science and Statistics, and Meta-Research Innovation Center at Stanford (METRICS), Stanford University, California, USA.; Tugwell P; Department of Medicine, School of Epidemiology, Public Health and Community Medicine, University of Ottawa, Canada.; Devoe D; Department of Medicine, University of Calgary, Cumming School of Medicine, Calgary, Canada.; Williamson P; MRC North West Hub for Trials Methodology Research, Institute of Translational Medicine, University of Liverpool, Liverpool, UK.; Terwee CB; Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Epidemiology and Biostatistics and the Amsterdam Public Health Research Institute, Amsterdam, NL.; Suarez-Almazor ME; Department of Health Services Research and Section of Rheumatology and Clinical Immunology, University of Texas MD Anderson Cancer Centre, Houston, TX, USA.; Strand V; Division of Immunology/Rheumatology, Stanford University, Palo Alto CA, USA.; Leong AL; Healthy Motivation; Global Alliance for Musculoskeletal Health, Bone and Joint Decade, Santa Barbara, California USA.; Conaghan PG; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds, UK; NIHR Leeds Biomedical Research Centre, Leeds, UK.; Boers M; Department of Epidemiology and Biostatistics and the Amsterdam Rheumatology and immunology Centre, Amsterdam University Medical Centers, Vrije Universiteit, Amsterdam, NL.; Shea BJ; Ottawa Hospital Research Institute, Clinical Epidemiology Program and School of Epidemiology and Public Health, University of Ottawa, Canada.; Brooks PM; Centre for Health Policy Melbourne School of Population and Global Health University of Melbourne and Northern Health, Australia.; Simon LS; SDG LLC Cambridge, MA 02138, USA.; Furst DE; David Geffen School of Med. Division Rheumatology. UCLA, USA.; Christensen R; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Research Unit of Rheumatology, Department of Clinical Research, University of Southern Denmark, Odense University Hospital, Denmark. Electronic address: Robin.Christensen@regionh.dk.

Publisher: W.B. Saunders Country of Publication: United States NLM ID: 1306053 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1532-866X (Electronic) Linking ISSN: 00490172 NLM ISO Abbreviation: Semin Arthritis Rheum Subsets: MEDLINE

Barroso N; Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, California, USA.; Woodworth TG; Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, California, USA.; Furst DE; Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, California, USA.; University of Washington, Seattle, Washington, USA.; University of Florence, Florence, Italy.; Guillemin F; Inserm CIC 1433 Clinical Epidemiology, University Hospital, Nancy, France.; Université de Lorraine, EA 4360 APEMAC, Nancy, France.; Fautrel BJ; UPMC, GRC08, Pierre Louis Institute of Epidémiology and Public Health, 56 Boulevard Vincent Auriol, Paris, France.; Department of Rheumatology, APHP, Pitié-Salpétrière University Hospital, 47-83 Boulevard de l'Hôpital, Paris, France.; Borazan N; Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, California, USA.; Kafaja S; Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, California, USA.; Brook J; Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, California, USA.; Elashoff DA; Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, California, USA.; Ranganath VK; Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, California, USA. vranganath@mednet.ucla.edu.

Publisher: Springer Country of Publication: Germany NLM ID: 8211469 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1434-9949 (Electronic) Linking ISSN: 07703198 NLM ISO Abbreviation: Clin Rheumatol Subsets: MEDLINE

Woodworth, TG; Furst, DE; Strand, V; Kempeni, J; Fenner, H; Lau, CS; Miller, F; Day, R; Lipani, J; Brooks, P

The Journal of rheumatology. 28(5)

Nielsen SM; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Tugwell P; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; de Wit MPT; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Boers M; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Beaton DE; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Woodworth TG; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Escorpizo R; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Shea B; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Toupin-April K; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Guillemin F; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Strand V; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Singh JA; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Kloppenburg M; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Furst DE; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Wells GA; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Smolen JS; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Veselý R; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Boonen A; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Storgaard H; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Voshaar M; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; March L; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital.; Christensen R; From the Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen; The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute; Children's Hospital of Eastern Ontario Research Institute; Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa; Institute for Work and Health, Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; Department of Epidemiology and Biostatistics; Amsterdam Rheumatology and Immunology Center; Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; Care and Public Health Research Institute, Maastricht University, Maastricht; University of Twente, Department of Psychology, Health and Technology, Enschede, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Medicine Service, VA Medical Center, Birmingham; Department of Medicine, School of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont; University of Washington, Seattle, Washington, USA; Swiss Paraplegic Research, Nottwil, Switzerland; Université de Lorraine, EA 4360 Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; University of Florence, Florence, Italy; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria; European Medicines Agency, London, UK; Faculty of Medicine and Health University of Sydney and Department of Rheumatology, Royal North Shore Hospital, Sydney, Australia. Robin.Christensen@regionh.dk.; S.M. Nielsen, MSc, Biostatistics and Clinical Epidemiology Fellow, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital and The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark; P. Tugwell, MD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; M.P. de Wit, PhD, OMERACT patient research partner, and Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; M. Boers, MD, PhD, Professor of Clinical Epidemiology, Amsterdam UMC, Vrije Universiteit Amsterdam; D.E. Beaton, BscOT, PhD, Associate Professor, Occupational Science and Occupational Therapy, University of Toronto, and Senior Scientist, Institute for Work and Health; T.G. Woodworth, MD, Visiting Clinical Researcher, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, UCLA; R. Escorpizo, PT, DPT, MSc, Clinical Associate Professor, Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, and Adjunct Senior Research Scientist, Swiss Paraplegic Research; B. Shea, PhD, Clinical Investigator and Adjunct Professor, Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; K. Toupin-April, PhD, Scientist, Children's Hospital of Eastern Ontario Research Institute, and Assistant Professor, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa; F. Guillemin, MD, PhD, Université de Lorraine, EA 4360 APEMAC, Nancy, and INSERM CIC 1433, University Hospital; V. Strand, MD, MACR, FACP, Biopharmaceutical Consultant; J.A. Singh, MBBS, MPH, Professor of Medicine and Epidemiology, Department of Medicine at the School of Medicine, University of Alabama at Birmingham; M. Kloppenburg, MD, PhD, Professor of Rheumatology, Leiden University Medical Center; D.E. Furst, MD, David Geffen School of Medicine, Division of Rheumatology, UCLA, and University of Washington, and University of Florence; G.A. Wells, PhD, School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; J.S. Smolen, MD, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna; R. Veselý, MD, Head of the Rheumatology, Respiratory, Gastroenterology and Immunology Office, Scientific and Regulatory Management Department, European Medicines Agency; A. Boonen, MD, Professor of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, and Care and Public Health Research Institute, Maastricht University; H. Storgaard, MSc student, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, and Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; M. Voshaar, MSc, PhD student at University of Twente, Department Psychology, Health and Technology; L.M. March, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology University of Sydney, Head of Department of Rheumatology, Royal North Shore Hospital; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, The Rheumatology Research Unit, Department of Rheumatology, Odense University Hospital and University of Southern Denmark, and Head of Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital. Robin.Christensen@regionh.dk.

Publisher: Journal Of Rheumatology Publishing Co Country of Publication: Canada NLM ID: 7501984 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1499-2752 (Electronic) Linking ISSN: 0315162X NLM ISO Abbreviation: J Rheumatol Subsets: MEDLINE

Finger ME; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; Boonen A; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; Woodworth TG; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; Escorpizo R; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; Christensen R; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; Nielsen SM; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; Leong AL; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; Scholte Voshaar M; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; Flurey CA; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; Milman N; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; Verstappen SM; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; Alten R; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; Guillemin F; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; Kloppenburg M; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; Beaton DE; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; Tugwell PS; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; March LM; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; Furst DE; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin.; Pohl C; From the Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, Nottwil, Switzerland; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre; CAPHRI Research Institute, Maastricht University, Maastricht; Department of Psychology, Health and Technology, University of Twente, Enschede; Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles; Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation, Santa Barbara, California; Department of Rehabilitation and Movement Science, The University of Vermont, Burlington, Vermont, USA; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark; Faculty of Health and Applied Sciences, University of the West of England, Bristol; Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK; Division of Rheumatology, Department of Medicine, University of Ottawa and Ottawa Hospital; Centre for Global Health, Institute of Population Health, University of Ottawa and Ottawa Hospital; Department of Clinical Epidemiology, Ottawa Hospital Research Institute; Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa; Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital; Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Departments of Occupational Science and Occupational Therapy, University of Toronto, Toronto, Ontario, Canada; Schlosspark-Klinik, University Medicine Berlin, Berlin, Germany; University of Lorraine, EA 4360 APEMAC, Nancy, France; Institute of Bone and Joint Research, University of Sydney; Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, Sydney; Department of Rheumatology, Royal North Shore Hospital, St Leonards, Australia. christoph.pohl222@googlemail.com.; M.E. Finger, PT, PhD, MPTSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research; A. Boonen, MD, PhD, Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre, and CAPHRI Research Institute, Maastricht University; T.G. Woodworth, MD, Consultant, Division of Rheumatology, David Geffen School of Medicine, University of California; R. Escorpizo, PT, DPT, MSc, Empowerment, Participation and Social Integration Unit, Swiss Paraplegic Research, and Department of Rehabilitation and Movement Science, The University of Vermont; R. Christensen, PhD, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; S.M. Nielsen, MSc, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; A.L. Leong, MBA, Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, and Healthy Motivation; M. Scholte Voshaar, MSc, Department of Psychology, Health and Technology, University of Twente; C.A. Flurey, PhD CPsychol, Faculty of Health and Applied Sciences, University of the West of England; N. Milman, PhD, Division of Rheumatology, Department of Medicine, University of Ottawa and the Ottawa Hospital, and Department of Clinical Epidemiology, Ottawa Hospital Research Institute; S.M. Verstappen, PhD, Arthritis Research UK Epidemiology Unit, University of Manchester; R. Alten, MD, PhD, Schlosspark-Klinik, University Medicine Berlin; F. Guillemin, MD, PhD, University of Lorraine, EA 4360 APEMAC; M. Kloppenburg, MD, PhD, Professor, Department of Rheumatology, and Department of Clinical Epidemiology, Leiden University Medical Centre; D.E. Beaton, PhD, Musculoskeletal Health and Outcomes Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, and Institute for Work and Health, and Institute of Health Policy, Management and Evaluation, Rehabilitation Sciences Institute, and Department of Occupational Science and Occupational Therapy, University of Toronto, and Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; P.S. Tugwell, MD, Department of Epidemiology and Community Medicine, University of Ottawa, and Centre for Global Health, Institute of Population Health, University of Ottawa, and Ottawa Hospital; L.M. March, MBBS, PhD, Liggins Professor of Rheumatology and Musculoskeletal Epidemiology, Sydney Medical School, and Institute of Bone and Joint Research, University of Sydney, and Department of Rheumatology, Royal North Shore Hospital; D.E. Furst, MD, Division of Rheumatology, David Geffen School of Medicine, University of California; C. Pohl, MD, Schlosspark-Klinik, University Medicine Berlin. christoph.pohl222@googlemail.com.

Publisher: Journal Of Rheumatology Publishing Co Country of Publication: Canada NLM ID: 7501984 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1499-2752 (Electronic) Linking ISSN: 0315162X NLM ISO Abbreviation: J Rheumatol Subsets: MEDLINE

Bartlett SJ; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia. susan.bartlett@mcgill.ca.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University. susan.bartlett@mcgill.ca.; Barbic SP; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.; Bykerk VP; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.; Choy EH; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.; Alten R; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.; Christensen R; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.; den Broeder A; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.; Fautrel B; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.; Furst DE; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.; Guillemin F; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.; Hewlett S; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.; Leong AL; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.; Lyddiatt A; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.; March L; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.; Montie P; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.; Pohl C; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.; Scholte Voshaar M; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.; Woodworth TG; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.; Bingham CO 3rd; From McGill University, Montreal, Quebec; University of British Columbia, Vancouver, British Columbia, Canada; Johns Hopkins University, Baltimore, Maryland; Hospital for Special Surgery, New York, New York; University of California, Los Angeles; Healthy Motivation, Santa Barbara, California, USA; Cardiff University, Cardiff; University of the West of England, Bristol, UK; Schlosspark-Klinik University Medicine, Berlin, Germany; Parker Institute, Copenhagen University, Copenhagen, Denmark; Sint Maartenskliniek, Nijmege; Vrije Universiteit (VU), Amsterdam, the Netherlands; Pierre et Marie Curie University, Paris; University of Lorraine, Lorraine, France; University of Sydney, Sydney, Australia.; S.J. Bartlett, PhD, McGill University, and Johns Hopkins University; S.P. Barbic, PhD, University of British Columbia; V.P. Bykerk, MD, Hospital for Special Surgery; E.H. Choy, MD, Cardiff University; R. Alten, MD, Schlosspark-Klinik University Medicine; R. Christensen, PhD, Parker Institute, Copenhagen University; A. den Broeder, MD, PhD, Sint Maartenskliniek; B. Fautrel, MD, PhD, Pierre et Marie Curie University; D.E. Furst, MD, University of California; F. Guillemin, MD, PhD, University of Lorraine; S. Hewlett, PhD, RN, University of the West of England; A.L. Leong, MBA, Healthy Motivation; A. Lyddiatt, Patient Research Partner; L. March, MD, PhD, University of Sydney; P. Montie, Patient Research Partner; C. Pohl, MD, Schlosspark-Klinik University Medicine; M. Scholte Voshaar, MSc, VU; T.G. Woodworth, MD, University of California; C.O. Bingham III, MD, Johns Hopkins University.

Publisher: Journal Of Rheumatology Publishing Co Country of Publication: Canada NLM ID: 7501984 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1499-2752 (Electronic) Linking ISSN: 0315162X NLM ISO Abbreviation: J Rheumatol Subsets: MEDLINE

Mahler E; a Department of Rheumatology , Sint Maartenskliniek , Nijmegen , The Netherlands.; den Broeder AA; a Department of Rheumatology , Sint Maartenskliniek , Nijmegen , The Netherlands.; Woodworth TG; b Division of Rheumatology , Geffen School of Medicine UCLA , Los Angeles , CA , USA.; Busch V; c Department of Orthopedics , Sint Maartenskliniek , Nijmegen , The Netherlands.; van den Hoogen FH; a Department of Rheumatology , Sint Maartenskliniek , Nijmegen , The Netherlands.; d Department of Rheumatology , Radboud University Medical Centre , Nijmegen , The Netherlands.; Bijlsma J; e Department of Rheumatology and Clinical Immunology , University Medical Centre Utrecht , Utrecht , The Netherlands.; van den Ende C; a Department of Rheumatology , Sint Maartenskliniek , Nijmegen , The Netherlands.

Publisher: Informa Healthcare Country of Publication: England NLM ID: 0321213 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1502-7732 (Electronic) Linking ISSN: 03009742 NLM ISO Abbreviation: Scand J Rheumatol Subsets: MEDLINE

Woodworth TG; Department of Medicine, Division of Rheumatology, David Geffen School of Medicine, UCLA, Los Angeles.; Morgacheva O; Department of Medicine, Division of Rheumatology, David Geffen School of Medicine, UCLA, Los Angeles.; Pimienta OL; Keck School of Medicine, University of Southern California, Santa Monica, CA, USA.; Troum OM; Keck School of Medicine, University of Southern California, Santa Monica, CA, USA.; Ranganath VK; Department of Medicine, Division of Rheumatology, David Geffen School of Medicine, UCLA, Los Angeles.; Furst DE; Department of Medicine, Division of Rheumatology, David Geffen School of Medicine, UCLA, Los Angeles.

Publisher: Oxford University Press Country of Publication: England NLM ID: 100883501 Publication Model: Print Cited Medium: Internet ISSN: 1462-0332 (Electronic) Linking ISSN: 14620324 NLM ISO Abbreviation: Rheumatology (Oxford) Subsets: MEDLINE

Nielsen SM; Section for Biostatistics and Evidence-Based Research, The Parker Institute, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark; Research Unit of Rheumatology, Department of Clinical Research, University of Southern Denmark, Odense University Hospital, Odense, Denmark.; Boers M; Department of Epidemiology & Data Science, and Amsterdam Rheumatology and Immunology Center, Amsterdam University Medical Centers, Vrije Universiteit, Amsterdam, the Netherlands.; de Wit M; OMERACT Patient Research Partner, Amsterdam, the Netherlands.; Shea B; Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada.; van der Windt DA; School of Medicine, Keele University, Staffordshire, United Kingdom.; Reeves BC; Bristol Trials Centre, Bristol Medical School, University of Bristol, Bristol, United Kingdom.; Beaton D; Institute for Work and Health, and Department of Occupational Science and Occupational Therapy, Rehabilitation Sciences Institute and the Institute for Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada.; Alten R; Rheumatology, Clinical Immunology, Osteology, Physical Therapy and Sports Medicine, Schlosspark-Klinik Charité, University Medicine Berlin, Germany.; Toupin April K; Children's Hospital of Eastern Ontario Research Institute, Department of Pediatrics and School of Rehabilitation Sciences, University of Ottawa, Ottawa, Ontario, Canada.; Boonen A; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, Maastricht, the Netherlands; Care and Public Health Research Institute (CAPHRI), Maastricht University, Maastricht, the Netherlands.; Escorpizo R; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, VT, United States; Swiss Paraplegic Research, Nottwil, Switzerland.; Flurey C; Department of Health and Social Sciences, Faculty of Health and Applied Sciences, University of the West of England, Bristol, United Kingdom.; Furst DE; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles, CA, United States; University of Washington, Seattle, California, United States; University of Florence, Florence, Italy.; Guillemin F; Université de Lorraine, APEMAC, 54000 Nancy, France.; Leong A; Healthy Motivation, and Bone and Joint Decade, the Global Alliance for Musculoskeletal Health, Santa Barbara, CA, United States.; Pohl C; Rheumatology, Clinical Immunology, Osteology, Physical Therapy and Sports Medicine, Schlosspark-Klinik Charité, University Medicine Berlin, Germany.; Rasmussen MU; Section for Biostatistics and Evidence-Based Research, The Parker Institute, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark.; Singh JA; Medicine Service, VA Medical Center, 700 19th St S, Birmingham 35233, AL United States; Department of Medicine at the School of Medicine, University of Alabama at Birmingham (UAB), 1720 Second Ave. South, Birmingham, AL 35294-0022, United States; Department of Epidemiology at the UAB School of Public Health, 1665 University Blvd., Ryals Public Health Building, Room 220, Birmingham, AL 35294-0022, United States.; Smolen JS; Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Vienna, Austria.; Strand V; Division of Immunology/Rheumatology, Stanford University, Palo Alto, CA, United States.; Verstappen SMM; Centre for Epidemiology Versus Arthritis, Centre for Musculoskeletal Research, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, United Kingdom; NIHR Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, United Kingdom.; Voshaar M; Department of Pharmacy, Sint Maartenskliniek, The Netherlands. Department of Pharmacy, Radboudumc, Nijmegen, the Netherlands.; Woodworth TG; Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles, CA, United States.; Ellingsen T; Research Unit of Rheumatology, Department of Clinical Research, University of Southern Denmark, Odense University Hospital, Odense, Denmark.; March L; Florance and Cope Professorial Department of Rheumatology, Royal North Shore Hospital and Institute of Bone and Joint Research, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia.; Wells GA; School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada.; Tugwell P; Department of Medicine, University of Ottawa, Ottawa, Ontario, Canada.; Christensen R; Section for Biostatistics and Evidence-Based Research, The Parker Institute, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark; Research Unit of Rheumatology, Department of Clinical Research, University of Southern Denmark, Odense University Hospital, Odense, Denmark. Electronic address: robin.christensen@regionh.dk.

Publisher: W.B. Saunders Country of Publication: United States NLM ID: 1306053 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1532-866X (Electronic) Linking ISSN: 00490172 NLM ISO Abbreviation: Semin Arthritis Rheum Subsets: MEDLINE

Nielsen SM; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark sabrina.mai.nielsen@regionh.dk.; Research Unit of Rheumatology, Department of Clinical Research, University of Southern Denmark, Odense University Hospital, Odense, Denmark.; Storgaard H; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark.; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark.; Ellingsen T; Research Unit of Rheumatology, Department of Clinical Research, University of Southern Denmark, Odense University Hospital, Odense, Denmark.; Shea BJ; Ottawa Hospital Research Institute, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada.; Wells GA; School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada.; Welch VA; School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada.; Bruyere Research Institute, Ottawa, Ontario, Canada.; Furst DE; David Geffen School of Medicine, Division of Rheumatology, UCLA, Los Angeles, California, USA.; University of Washington, Seattle, Washington, USA.; University of Florence, Florence, Italy.; de Wit M; OMERACT Patient Research Partner, Zaltbommel, The Netherlands.; Voshaar M; Department Psychology, Health and Technology, University of Twente, Twente, The Netherlands.; Juhl CB; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark.; Department of Physiotherapy and Occupational Therapy, Copenhagen University Hospital, Herlev & Gentofte, Denmark.; Boers M; Department of Epidemiology & Biostatistics, Amsterdam Rheumatology and Immunology Center, Amsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.; Escorpizo R; Department of Rehabilitation and Movement Science, College of Nursing and Health Sciences, University of Vermont, Burlington, Vermont, USA.; Swiss Paraplegic Research, Nottwil, Switzerland.; Woodworth TG; David Geffen School of Medicine, Division of Rheumatology, UCLA, Los Angeles, California, USA.; Boonen A; Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Centre+, Maastricht, The Netherlands.; Care and Public Health Research Institute (CAPHRI), 6229 ER Maastricht University, Maastricht, The Netherlands.; Bliddal H; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark.; March LM; Florance and Cope Professorial Department of Rheumatology, Royal North Shore Hospital and Institute of Bone and Joint Research, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia.; Tugwell P; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada.; Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada.; Christensen R; Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark.; Research Unit of Rheumatology, Department of Clinical Research, University of Southern Denmark, Odense University Hospital, Odense, Denmark.

Publisher: Elsevier Country of Publication: United States NLM ID: 0372355 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1468-2060 (Electronic) Linking ISSN: 00034967 NLM ISO Abbreviation: Ann Rheum Dis Subsets: MEDLINE

Woodworth TG; Furst DE

Publisher: BioMed Central Country of Publication: England NLM ID: 101154438 Publication Model: Electronic Cited Medium: Internet ISSN: 1478-6362 (Electronic) Linking ISSN: 14786354 NLM ISO Abbreviation: Arthritis Res Ther Subsets: MEDLINE

Verhoef LM; Department of Rheumatology, Sint Maartenskliniek, Nijmegen, Netherlands. Electronic address: l.verhoef@maartenskliniek.nl.; den Broeder N; Department of Rheumatology, Sint Maartenskliniek, Nijmegen, Netherlands.; Thurlings RM; Department of Rheumatic Diseases, Radboudumc, Nijmegen, Netherlands.; van der Laan WH; Department of Rheumatology, Sint Maartenskliniek, Nijmegen, Netherlands.; van der Weele W; Department of Rheumatology, Reade, Amsterdam, Netherlands.; Kok MR; Department of Rheumatology and Clinical Immunology, Maasstad Hospital, Rotterdam, Netherlands.; Bernelot Moens HJ; Department of Rheumatology, Ziekenhuisgroep Twente, Almelo, Netherlands.; Woodworth TG; Department of Medicine/Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles, CA, USA.; van den Bemt BJF; Department of Rheumatology, Sint Maartenskliniek, Nijmegen, Netherlands; Department of Pharmacy, Radboudumc, Nijmegen, Netherlands.; van den Hoogen FHJ; Department of Rheumatology, Sint Maartenskliniek, Nijmegen, Netherlands; Department of Rheumatic Diseases, Radboudumc, Nijmegen, Netherlands.; den Broeder AA; Department of Rheumatology, Sint Maartenskliniek, Nijmegen, Netherlands; Department of Rheumatic Diseases, Radboudumc, Nijmegen, Netherlands.

Publisher: Elsevier Ltd Country of Publication: England NLM ID: 101765308 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 2665-9913 (Electronic) Linking ISSN: 26659913 NLM ISO Abbreviation: Lancet Rheumatol Subsets: MEDLINE; PubMed not MEDLINE

Changelian PS; Immunology Group, Department of Antibacterials and Immunology, Pfizer Global Researchand Development, Groton, CT 06340, USA. paul_s_changelian@groton.pfizer.com; Flanagan ME; Ball DJ; Kent CR; Magnuson KS; Martin WH; Rizzuti BJ; Sawyer PS; Perry BD; Brissette WH; McCurdy SP; Kudlacz EM; Conklyn MJ; Elliott EA; Koslov ER; Fisher MB; Strelevitz TJ; Yoon K; Whipple DA; Sun J; Munchhof MJ; Doty JL; Casavant JM; Blumenkopf TA; Hines M; Brown MF; Lillie BM; Subramanyam C; Shang-Poa C; Milici AJ; Beckius GE; Moyer JD; Su C; Woodworth TG; Gaweco AS; Beals CR; Littman BH; Fisher DA; Smith JF; Zagouras P; Magna HA; Saltarelli MJ; Johnson KS; Nelms LF; Des Etages SG; Hayes LS; Kawabata TT; Finco-Kent D; Baker DL; Larson M; Si MS; Paniagua R; Higgins J; Holm B; Reitz B; Zhou YJ; Morris RE; O'Shea JJ; Borie DC

Publisher: American Association for the Advancement of Science Country of Publication: United States NLM ID: 0404511 Publication Model: Print Cited Medium: Internet ISSN: 1095-9203 (Electronic) Linking ISSN: 00368075 NLM ISO Abbreviation: Science Subsets: MEDLINE

Woodworth TG; Department of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles, CA, USA.; Furst DE; Department of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles, CA, USA.; Division of Rheumatology, Department of Medicine, University of Washington, Seattle, WA, USA.; Department of Experimental Medicine, University of Florence, Florence, Italy.

Publisher: AME Publishing Company Country of Publication: China NLM ID: 101617978 Publication Model: Print Cited Medium: Print ISSN: 2305-5839 (Print) Linking ISSN: 23055839 NLM ISO Abbreviation: Ann Transl Med Subsets: PubMed not MEDLINE

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Berthelsen, D.B. ; Nielsen, S.M. ; Rasmussen, M.U. ; Voshaar, M. ; Richards, P. ; Bartlett, S.J. ; Hazlewood, G. ; Shea, B. ; Tugwell, P. ; Ellingsen, T. ; Jørgensen, T.S. ; Kristensen, S. ; Simon, L. ; Christensen, R. ; Flurey, C.

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Strom TB; Department of Medicine, Beth Israel Hospital, Boston, MA.; Kelley VR; Woodworth TG; Murphy JR

Publisher: Blackwell Country of Publication: England NLM ID: 7702118 Publication Model: Print Cited Medium: Print ISSN: 0105-2896 (Print) Linking ISSN: 01052896 NLM ISO Abbreviation: Immunol Rev Subsets: MEDLINE

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Publisher: Nature Pub. Group Country of Publication: England NLM ID: 101500081 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1759-507X (Electronic) Linking ISSN: 17595061 NLM ISO Abbreviation: Nat Rev Nephrol Subsets: PubMed not MEDLINE