1Division of Rheumatology, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Korea
2Division of Rheumatology, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea
3Division of Rheumatology, Konkuk University Medical Center, Seoul, Korea
4Division of Rheumatology, Kyung Hee University Hospital, Seoul, Korea
5Division of Rheumatology, Korea University Ansan Hospital, Ansan, Korea
6Division of Rheumatology, Daegu Catholic University Medical Center, Daegu, Korea
7Division of Rheumatology, Pusan National University Hospital, Busan, Korea
8Division of Rheumatology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
9Division of Rheumatology, Seoul National University Hospital, Seoul, Korea
10Division of Rheumatology, College of Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
11Division of Rheumatology, Gangnam Eulji Hospital, Eulji University School of Medicine, Seoul, Korea
12Division of Rheumatology, Soonchunhyang University Cheonan Hospital, Cheonan, Korea
13Division of Rheumatology, Ajou University Hospital, Suwon, Korea
14Division of Rheumatology, Pusan National University Yangsan Hospital, Yangsan, Korea
15Division of Rheumatology, Ulsan University Hospital, Ulsan, Korea
16Division of Rheumatology, Eulji University Hospital, Daejeon, Korea
17Division of Rheumatology, Inha University Hospital, Incheon, Korea
18Division of Rheumatology, Chonnam National University Hospital, Gwangju, Korea
19Division of Rheumatology, Chonbuk National University Hospital, Jeonju, Korea
20Division of Rheumatology, Jeju National University Hospital, Jeju, Korea
21Division of Rheumatology, Chung-Ang University Hospital, Seoul, Korea
22Division of Rheumatology, Hanyang University Guri Hospital, Guri, Korea
23Division of Rheumatology, Inje University Haeundae Paik Hospital, Busan, Korea
24Division of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea