[1] Univ Ulsan, Coll Med, Ulsan Univ Hosp, Div Rheumatol,Dept Internal Med, 877 Ban Geojinsunhwando Ro, Ulsan 44033, South Korea
[2] Pusan Natl Univ, Sch Med, Yangsan Hosp, Div Rheumatol,Dept Internal Med, Yangsan, South Korea
[3] Inje Univ, Haeundae Paik Hosp, Div Rheumatol, Dept Internal Med,Coll Med, Busan, South Korea