[1] Royal Prince Alfred Hosp, Dept Rheumatol, Sydney, NSW, Australia
[2] Univ Sydney, Dept Med, Sydney, NSW 2006, Australia
[3] Queen Elizabeth Hosp, Dept Rheumatol, Adelaide, SA, Australia
[4] Monash Univ, Cabrini Hosp, Monash Dept Clin Epidemiol, Melbourne, Vic 3004, Australia
[5] Monash Univ, Dept Epidemiol & Prevent Med, Melbourne, Vic 3004, Australia
[6] Redcliffe Hosp, Dept Med, Redcliffe, Qld, Australia
[7] Mercy Specialist Ctr, Auckland, New Zealand
[8] Royal Newcastle Ctr, Dept Rheumatol, Newcastle, NSW, Australia
[9] Monash Med Ctr, Melbourne, Vic, Australia
[10] Royal Perth Hosp, Dept Rheumatol, Perth, WA 6001, Australia
[11] Menzies Res Inst, Hobart, Tas, Australia