[1] Leeds Teaching Hosp Trust, NIHR Leeds Biomed Res Ctr, Leeds, W Yorkshire, England
[2] Univ Leeds, Inst Rheumat & Musculoskeletal Med, Leeds, W Yorkshire, England
[3] Diakonhjemmet Hosp, Rheumatol, Oslo, Norway
[4] Oregon Hlth & Sci Univ, Div Arthrit & Rheumat Dis, Portland, OR 97201 USA
[5] UPMC Univ Paris 06, Rheumatol, Paris, France
[6] Hop La Pitie Salpetriere, Paris, France
[7] Stanford Univ, Sch Med, Immunol & Rheumatol, Palo Alto, CA 94304 USA
[8] Rigshosp, Copenhagen Ctr Arthrit Res COPECARE, Glostrup, Denmark
[9] RTI Hlth Solut, Patient Ctr Outcomes Assessment, Durham, NC USA
[10] Novartis Pharmaceut, Immunol & Dermatol, E Hanover, NJ USA
[11] Novartis Pharmaceut, Worldwide Med Affairs Immunol & Dermatol, E Hanover, NJ USA
[12] Novartis Pharma AG, Immunol & Dermatol, Basel, Switzerland