[1] Melbourne Hlth, Dept Rheumatol, Melbourne, Vic, Australia
[2] Monash Univ, Sch Populat Hlth & Preventat Med, Clayton, Vic, Australia
[3] St Vincents Hosp Melbourne, Melbourne, Vic, Australia
[4] Univ Adelaide, Adelaide, SA, Australia
[5] Royal Adelaide Hosp, Adelaide, SA, Australia
[6] Monash Hlth, Melbourne, Vic, Australia
[7] Monash Univ, Melbourne, Vic, Australia
[8] John Hunter Hosp, Royal Newcastle Ctr, Newcastle, NSW, Australia
[9] Univ Newcastle, Newcastle, NSW, Australia
[10] Fiona Stanley Hosp, Perth, WA, Australia
[11] Univ Melbourne, Melbourne, Vic, Australia