[1] Kinki Univ, Dept Hematol & Collagen Dis, Sch Med, Osaka, Japan
[2] Univ Melbourne, St Vincents Hosp Melbourne, Dept Internal Med, Melbourne, Vic, Australia
[3] St Vincents Hosp Melbourne, Dept Rheumatol, Melbourne, Vic, Australia
[4] Univ Rochester, Dept Allergy Immunol & Rheumatol, Sch Med, Rochester, NY USA