[1] Univ Bristol, Bristol Royal Infirm, Acad Rheumatol Unit, Bristol, Avon, England
[2] Vrije Univ Amsterdam, Dept Med Humanities, Amsterdam, Netherlands
[3] Patient Ctr Outcomes Res Inst, Washington, DC USA
[4] Univ Warwick, Warwick Med Sch, Royal Coll Nursing Res Inst, Coventry, W Midlands, England
[5] Univ Hertfordshire, Sch Life & Med Sci, Hatfield, Herts, England
[6] Univ Warwick, Warwick Med Sch, Coventry, W Midlands, England
[7] Univ British Columbia, Dept Occupat Sci & Occupat Therapy, Vancouver, BC, Canada
[8] CIBERESP, IMIM Inst Hosp Mar Invest Med, Barcelona, Spain
[9] Univ Lorraine, Fac Med, Vandoeuvre Les Nancy, France
[10] McGill Univ, Div Clin Epidemiol, Montreal, PQ, Canada
[11] McGill Univ, Div Rheumatol, Montreal, PQ, Canada
[12] McGill Univ, Div Respirol, Montreal, PQ, Canada