[1] NGI NCHA, Rotterdam, Netherlands
[2] City Hosp Nottingham, Acad Rheumatol, Nottingham NG5 1PB, England
[3] Univ Southampton, Southampton Gen Hosp, MRC Epidemiol Resource Ctr, Southampton SO16 6YD, Hants, England
[4] Univ Oxford, Dept Orthopaed Rheumatol & Musculoskeletal Sci, NIHR Musculoskeletal Biomed Res Unit, Oxford OX3 7LD, England
[5] NYU, Sch Med, Dept Med, Div Rheumatol, New York, NY 10016 USA
[6] Leiden Univ, Med Ctr, Dept Mol Epidemiol, Leiden, Netherlands
[7] Univ Ioannina, Sch Med, Dept Hyg & Epidemiol, GR-45110 Ioannina, Greece
[8] Kings Coll London, St Thomas Hosp, Dept Twin Res & Genet Epidemiol, London WC2R 2LS, England
[9] Erasmus MC, Dept Epidemiol, NL-3000 DR Rotterdam, Netherlands
[10] Univ Tartu, Dept Internal Med, Tartu, Estonia
[11] Erasmus MC, Genet Lab, Dept Internal Med, NL-3000 DR Rotterdam, Netherlands
[12] Univ Tartu, Inst Gen & Mol Pathol, Immunol Grp, Tartu, Estonia
[13] Leiden Univ, Med Ctr, Dept Rheumatol & Clin Epidemiol, Leiden, Netherlands
[14] AstraZeneca, Charnwood R&D, Resp & Inflammat Res Area, Loughborough LE11 5RH, Leics, England
[15] Univ Warwick, Coventry CV4 7AL, W Midlands, England
[16] Warwick Med Sch, Hlth Sci Res Inst, Coventry CV4 7AL, W Midlands, England
[17] Mersin Univ, Fac Med, Dept Phys Med & Rehabil, Mersin, Turkey
[18] UCL, Ctr Cardiovasc Genet, Dept Med, London, England
[19] Univ Tartu, Dept Sport Med & Rehabil, Tartu, Estonia