[1] Natl Univ Singapore Hosp, Div Rheumatol, 1E Kent Ridge Rd,NUHS Tower Block,Level 10, Singapore 119228, Singapore
[2] Vrije Univ Amsterdam Med Ctr, Med Humanities, Amsterdam, Netherlands
[3] Johns Hopkins Univ, Div Rheumatol, Baltimore, MD USA
[4] Univ Bristol, Acad Rheumatol Unit, Bristol Royal Infirm, Bristol, Avon, England
[5] Hlth Motivat Bone & Joint Decade, Santa Barbara, CA USA
[6] Univ Sydney, Inst Bone & Joint Res, St Leonards, NSW, Australia
[7] Univ Sydney, Sydney Med Sch, St Leonards, NSW, Australia
[8] Univ Sydney, Sch Publ Hlth, St Leonards, NSW, Australia
[9] Royal N Shore Hosp, Dept Rheumatol, St Leonards, NSW 2065, Australia
[10] Arthrit Res Ctr Canada, Arthrit Patient Advisory Board, Vancouver, BC, Canada
[11] Univ Twente, Dept Psychol Hlth & Technol, NL-7500 AE Enschede, Netherlands
[12] Univ Paris 06, Sorbonne Univ, Pitie Salpetriere Hosp, AP HP,Inst Pierre Louis Epidemiol & Sante Publ,De, Paris, France