[1] Univ Manchester, Div Musculoskeletal & Dermatol Sci, Ctr Epidemiol Versus Arthrit, Manchester, Lancs, England
[2] Univ Nottingham, Acad Rheumatol, Sch Med, Nottingham, England
[3] Univ Nottingham, Sch Hlth Sci, Nottingham, England
[4] Univ Messina, Rheumatol Unit, Messina, Italy
[5] Univ Nova Lisboa, NOVA Med Sch, CEDOC, Fac Ciencias Med, Lisbon, Portugal
[6] Ben Gurion Univ Negev, Negev, Beer Sheva, Israel
[7] Michigan Med, Ann Arbor, MI USA
[8] Vanderbilt Univ, Med Ctr, Nashville, TN USA
[9] McGill Univ, Montreal, PQ, Canada
[10] Johns Hopkins Univ, Baltimore, MD USA
[11] Karolinska Inst, Dept Clin Neurosci, Stockholm, Sweden
[12] Uppsala Univ, Dept Surg Sci, Uppsala, Sweden
[13] Univ Aberdeen, Epidemiol Grp, Aberdeen, Scotland
[14] Univ Aberdeen, Aberdeen Ctr Arthrit & Musculoskeletal Hlth, Aberdeen, Scotland
[15] Primary Integrated Commun Serv Ltd, Nottingham, England
[16] Univ Wisconsin, Dept Orthoped & Rehabil, Sch Med & Publ Hlth, Madison, WI USA
[17] Midlands NHS Fdn Trust, Stoke On Trent, Staffs, England
[18] Univ Coimbra, Inst Clin & Biomed Res iCBR, Ctr Hosp Univ Coimbra, Fac Med,Rheumatol Dept, Coimbra, Portugal
[19] Cardiff Univ, Sch Med, Cardiff, Wales
[20] Univ Washington, Sch Med, Seattle, WA USA