[1] London Northwest Univ Healthcare NHS Trust, Dept Rheumatol, London, England
[2] Med Coll Wisconsin, Dept Rheumatol, Milwaukee, WI USA
[3] Univ Pittsburgh, Dept Med, Div Rheumatol & Clin Immunol, Pittsburgh, PA USA
[4] St James Hosp, Dept Rheumatol, Dublin, Ireland
[5] Austin Hlth, Dept Rheumatol, Dept Clin Pharmacol & Therapeut, Melbourne, Vic, Australia
[6] Univ Melbourne, Dept Med, Melbourne, Vic, Australia
[7] Postgrad Inst Med Educ & Res, Dept Internal Med, Clin Immunol & Rheumatol Wing, Chandigarh, India
[8] Harvard Univ, Harvard Med Sch, Massachusetts Gen Hosp, Rheumatol Unit, Boston, MA USA
[9] Univ Leeds, Leeds Inst Rheumat & Musculoskeletal Med, Leeds, W Yorkshire, England
[10] Leeds Teaching Hosp NHS Trust, Leeds Biomed Res Ctr, Leeds, W Yorkshire, England
[11] UCL, Ctr Inflammat & Tissue Repair, Div Med, UCL Resp, London WC1E 6JF, England
[12] Univ Coll London Hosp NHS Trust, Dept Rheumatol, London, England