[1] Univ Melbourne, Dept Med, Melbourne, Vic, Australia
[2] St Vincents Hosp, Dept Rheumatol, Melbourne, Vic, Australia
[3] Royal Adelaide Hosp, Dept Rheumatol, Adelaide, SA, Australia
[4] Austin Hosp, Dept Resp Med, Melbourne, Vic, Australia
[5] Natl Univ Athens, Sch Med, Dept Pathophysiol, Athens, Greece