[1] Univ Paris Cite, Hop Cochin, AP HP Ctr, Serv Rhumatol, F-75014 Paris, France
[2] Univ Jean Monnet, SAINBIOSE, INSERM, U1059, St Etienne, France
[3] CHU St Etienne, Serv Rhumatol, F-42055 St Etienne, France
[4] CIC 1408, St Etienne, France
[5] Univ Autonoma Madrid, Univ Hosp Paz, Inst Hlth Res IdiPAZ, Rheumatol Unit, Madrid 28046, Spain
[6] Publ Hlth Expertise, Dept Affaires Med, 10 Blvd Sebastopol, F-75004 Paris, France
[7] Nord Pharm, Siriusdreef 41, NL-2132 Hoofddorp, Netherlands
[8] Charles Univ Prague, Inst Rheumatol, Fac Med 1, Dept Rheumatol, Prague, Czech Republic
[9] Rheumazentrum Ostschweiz, Waisenhausstr 14, CH-9000 St Gallen, Switzerland
[10] St Vincents Univ Hosp, Elm Pk, Dublin 4, Ireland
[11] Univ Oxford, NDORMS, Botnar Res Ctr, Windmill Rd, Oxford OX3 7LD, England