[1] Seoul Natl Univ, WCU, Grad Sch Convergence Sci & Technol, Seoul, South Korea
[2] Seoul Natl Univ, Coll Med, Med Res Inst, Seoul, South Korea
[3] Seoul Natl Univ Hosp, Div Rheumatol, Seoul 110744, South Korea
[4] Inha Univ Hosp, Div Rheumatol, Seoul, South Korea
[5] Catholic Univ Korea, Seoul St Marys Hosp, Div Rheumatol, Seoul, South Korea
[6] Eulji Univ Hosp, Div Rheumatol, Taejon, South Korea
[7] Gachon Univ, Gil Med Ctr, Div Rheumatol, Inchon, South Korea
[8] Hanyang Univ, Med Ctr, Div Rheumatol, Seoul 133791, South Korea
[9] Hallym Univ, Med Ctr, Div Rheumatol, Seoul, South Korea
[10] Yonsei Univ Hlth Syst, Div Rheumatol, Seoul, South Korea
[11] Seoul Natl Univ, Bundang Hosp, Div Rheumatol, Seoul, South Korea
[12] Pusan Natl Univ Hosp, Div Rheumatol, Pusan, South Korea
[13] Sam Sung Med Ctr, Div Rheumatol, Seoul, South Korea
[14] Chung Buk Natl Univ Hosp, Div Rheumatol, Cheongju, South Korea