[1] Univ Amsterdam, Acad Med Ctr, Div Clin Immunol & Rheumatol, Room F4-218,POB 22700, NL-1100 DE Amsterdam, Netherlands
[2] Univ Cattolica Sacro Cuore, Div Rheumatol, Sch Med, I-00168 Rome, Italy
[3] Univ Pavia, Div Rheumatol, IRCCS Policlin San Matteo Fdn, I-27100 Pavia, Italy
[4] Univ Med & Pharm, Dept Rheumatol, Cluj Napoca, Romania
[5] Univ Lisbon, Rheumatol Res Unit, Inst Mol Med, Fac Med, P-1699 Lisbon, Portugal
[6] St Vincents Univ Hosp, Dept Rheumatol, Dublin 4, Ireland
[7] Leeds Inst Mol Med, Sect Musculoskeletal Dis, London, England
[8] Barts & London Queen Marys Sch Med & Dent, William Harvey Res Inst, London, England
[9] Karolinska Univ Hosp, Karolinska Inst, Rheumatol Unit, Dept Med, Stockholm, Sweden
[10] Univ Glasgow, Div Immunol Infect & Inflammat, Glasgow Biomed Res Ctr, Glasgow, Lanark, Scotland
[11] Leeds Teaching Hosp Trust, NIHR Leeds Musculoskeletal Biomed Res Unit, Leeds, W Yorkshire, England