[1] Hop Hotel Dieu, Ctr Clin Epidemiol, F-75181 Paris, France
[2] Univ Paris 05, INSERM, U738, Paris, France
[3] Hop Bicetre, AP HP, INSERM, Dept Rheumatol,U802, F-94275 Le Kremlin Bicetre, France
[4] Univ Paris 11, Le Kremlin Bicetre, France
[5] INSERM, U1012, F-94275 Le Kremlin Bicetre, France
[6] Lund Univ, Skane Univ Hosp Malmo, Dept Rheumatol, Malmo, Sweden
[7] Haukeland Hosp, Dept Rheumatol, N-5021 Bergen, Norway
[8] Hosp Clin Barcelona, ICMiD, IDIBAPS, Lab Autoimmune Dis Josep Font, Barcelona, Spain
[9] Univ Fed Espirito Santo, Dept Med, Div Rheumatol, Vitoria, ES, Brazil
[10] Univ Hosp, Charite, Dept Rheumatol, Berlin, Germany
[11] Univ Groningen, Univ Med Ctr Groningen, Dept Rheumatol & Clin Immunol, Groningen, Netherlands
[12] Univ Athens, Sch Med, Dept Pathophysiol, GR-11527 Athens, Greece
[13] Vall Hebron Univ Hosp, Dept Autoimmune Syst Dis, Barcelona, Spain
[14] Univ Strasbourg, Ctr Natl Reference Malad Autoimmunes Rares, Strasbourg Univ Hosp, Dept Rheumatol,INSERM,UMRS 1109,FMTS, Strasbourg, France
[15] Univ Nord France, Claude Huriez Hosp, Dept Internal Med, Lille, France
[16] Oklahoma Med Res Fdn, Arthrit & Clin Immunol, Oklahoma City, OK 73104 USA
[17] Newcastle Univ, Musculoskeletal Res Grp, Newcastle Upon Tyne, Tyne & Wear, England
[18] Univ Hosp, Dept Rheumatol, Limoges, France
[19] Univ Pisa, Dept Internal Med, Rheumatol Unit, Pisa, Italy
[20] Univ Roma La Sapienza, Dept Internal Med, Rheumatol, I-00185 Rome, Italy
[21] Perugia Univ Hosp, Dept Rheumatol, Perugia, Italy
[22] Univ Bretagne Occidentale, Hop Cavale Blanche, Dept Rheumatol, Brest, France
[23] Univ Bretagne Occidentale, EA 2216, Brest, France
[24] Univ Med Ctr Ljubljana, Dept Rheumatol, Ljubljana, Slovenia
[25] Univ Tsukuba, Dept Internal Med, Tsukuba, Ibaraki 305, Japan
[26] Kurashiki Med Ctr, Rheumat Dis Ctr, Kurashiki, Okayama, Japan
[27] Univ Pavia, IRCCS S Matteo Fdn, Dept Rheumatol, I-27100 Pavia, Italy
[28] Univ Med Ctr Utrecht, Dept Rheumatol, Dept Rheumatol & Clin Immunol, Utrecht, Netherlands
[29] German Hosp, Dept Rheumatol, Buenos Aires, DF, Argentina
[30] Inst San Giuseppe, Rheumatol Sect, Lecce, Italy
[31] Univ Hosp Birmingham NHS Fdn Trust, Dept Rheumatol, Birmingham, W Midlands, England