[1] Karolinska Inst, Stockholm, Sweden
[2] Karolinska Univ Hosp, Div Rheumatol, Dept Med Solna, Stockholm, Sweden
[3] St Vincents Hosp, Fitzroy, Vic, Australia
[4] Univ Melbourne, St Vincents Hosp Melbourne, Dept Med, Melbourne, Vic, Australia
[5] Univ Melbourne, St Vincents Hosp Melbourne, Dept Rheumatol, Melbourne, Vic, Australia