[1] NIEHS, NIH, Bethesda, MD USA
[2] Hope Hosp, Salford M6 8HD, Lancs, England
[3] Inst Rheumatol, Prague 2, Czech Republic
[4] Univ Debrecen, Debrecan, Hungary
[5] UCL, London WC1E 6BT, England
[6] Northwestern Univ, Feinberg Sch Med, Chicago, IL 60611 USA
[7] Mayo Clin, Rochester, MN USA
[8] Karolinska Inst, Rheumatol Unit, Stockholm, Sweden
[9] Hosp Univ Gen Vall dHebron, Barcelona, Spain
[10] UCL, London WC1E 6JF, England
[11] Univ Manchester, Sch Med, Manchester, Lancs, England
[12] Feinstein Inst Med Rsch, Manhasset, NY USA
[13] Feinstein Inst Med Reschearch, Manhasset, NY USA