[1] Univ Ulsan, Div Rheumatol, Dept Internal Med, Coll Med,Ulsan Univ Hosp, Ulsan 682714, South Korea
[2] Univ Ulsan, Div Rheumatol, Dept Internal Med, Asan Med Ctr,Coll Med, Seoul 138736, South Korea
[3] Inje Univ, Div Rheumatol, Dept Internal Med, Haeundae Paik Hosp, Pusan, South Korea