[1] Univ Manchester, Arthritis Res UK Ctr Epidemiol, Manchester M13 9PL, Lancs, England
[2] UCL, Rheumatol Unit, Inst Child Hlth, London, England
[3] Charles Univ Prague, Inst Rheumatol, Prague, Czech Republic
[4] Univ Debrecen, Debrecen, Hungary
[5] Karolinska Inst, Stockholm, Sweden
[6] Vall dHebron Gen Hosp, Barcelona, Spain
[7] Univ Med Ctr Utrecht, Utrecht, Netherlands
[8] Univ Manchester, CIGMR, Manchester M13 9PL, Lancs, England
[9] Salford Royal Hosp, Manchester, Lancs, England
[10] Feinstein Inst Med Res, New York, NY USA