[1] Hanyang Univ, Hosp Rheumat Dis, Clin Res Ctr Rheumatoid Arthrit, Seoul 133791, South Korea
[2] Hanyang Univ, Hosp Rheumat Dis, Seoul 133791, South Korea
[3] Chonnam Natl Univ Hosp, Kwangju, South Korea
[4] Ewha Womans Univ, Mokdong Hosp, Seoul, South Korea
[5] Jeju Natl Univ Hosp, Cheju, South Korea
[6] Hanyang Univ, Guri Hosp, Guri, South Korea
[7] Inje Univ, Ilsan Paik Hosp, Goyang, South Korea
[8] Chonbuk Natl Univ Hosp, Jeonju, South Korea
[9] Catholic Univ, Daegu Sch Med, Taegu, South Korea
[10] Konkuk Univ, Med Ctr, Seoul, South Korea
[11] Chungnam Natl Univ Hosp, Taejon, South Korea
[12] Dong A Univ Hosp, Pusan, South Korea
[13] Kyung Hee Univ Hosp, Seoul, South Korea
[14] Yeungnam Univ Hosp, Taegu, South Korea
[15] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Seoul, South Korea