[1] Paris Descartes Univ, Hop Cochin, APHP, Fac Med,Rheumatol Dept B,Serv Rhumatol B, F-75014 Paris, France
[2] Dijon Univ Hosp, Dept Rheumatol, F-21078 Dijon, France
[3] Univ Burgundy, F-21079 Dijon, France
[4] INSERM, U887, F-21079 Dijon, France
[5] Univ Geneva, CH-1211 Geneva 4, Switzerland
[6] Univ Leeds, Sect Musculoskeletal Dis, Leeds, W Yorkshire, England
[7] NIHR Leeds Musculoskeletal Biomed Res Unit, Leeds, W Yorkshire, England
[8] Toronto Western Res Inst, Div Hlth Care & Outcomes Res & Arthrit, Toronto, ON, Canada
[9] Toronto Western Res Inst, Community Res & Evaluat Unit, Toronto, ON, Canada
[10] Univ Toronto, Dept Rehabil Sci, Toronto, ON M5S 1A1, Canada
[11] Univ Toronto, Dept Hlth Policy Management & Evaluat, Toronto, ON M5S 1A1, Canada
[12] Univ Dresden, Dept Orthopaed Surg, Dresden, Germany
[13] Univ Toronto, Div Rheumatol, Dept Med, Womens Coll Hosp, Toronto, ON M5S 1A1, Canada
[14] Univ Toronto, Clin Epidemiol & Hlth Care Res Program, Dept Hlth Policy Management & Evaluat, Fac Med, Toronto, ON M5S 1A1, Canada
[15] Univ Maryland, Sch Med, Dept Med, Div Rheumatol & Clin Immunol, Baltimore, MD 21201 USA
[16] Univ Maryland, Sch Med, Dept Epidemiol & Prevent Med, Div Gerontol, Baltimore, MD 21201 USA
[17] Harvard Univ, Sch Med, Dept Orthoped Surg, Boston, MA 02115 USA
[18] Harvard Univ, Brigham & Womens Hosp, Sch Med, Div Rheumatol Immunol & Allergy, Boston, MA 02115 USA
[19] Harvard Univ, Sch Publ Hlth, Dept Epidemiol, Boston, MA 02115 USA
[20] Leiden Univ Med Ctr, Dept Rheumatol, Leiden, Netherlands
[21] Leiden Univ Med Ctr, Dept Clin Epidemiol, Leiden, Netherlands
[22] St Vincents Hosp, Dept Rheumatol, Melbourne, Vic, Australia
[23] Western Hosp, Melbourne, Vic, Australia
[24] Lund Univ, Dept Orthopaed, Lund, Sweden
[25] Univ Toronto, Toronto Western Hosp, Div Orthopaed Surg, Toronto, ON M5T 2S8, Canada
[26] Univ Sydney, Royal N Shore Hosp, Inst Bone & Joint Res, St Leonards, NSW 2065, Australia
[27] Charles Univ Prague, Inst Rheumatol, CR-11636 Prague 1, Czech Republic
[28] Univ Padua, Rheumatol Unit, Dept Clin & Expt Med, I-35100 Padua, Italy
[29] Univ So Denmark, Inst Sports & Clin Biomech, Odense, Denmark
[30] Univ Sydney, Inst Bone & Joint Res, Sydney, NSW 2006, Australia
[31] Birmingham VA Med Ctr, Birmingham, AL USA
[32] Univ Alabama Birmingham, Birmingham, AL USA
[33] Univ Texas MD Anderson Canc Ctr, Rheumatol Sect, Houston, TX 77030 USA