1. Division of Rheumatology, Department of Internal Medicine, Chonnam National University Medical School & Hospital, Gwangju, Republic of Korea
2. Division of Rheumatology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Republic of Korea
3. Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Republic of Korea
4. Division of Rheumatology, Department of Internal Medicine, Chonnam National University Medical School & Hospital, 42 Jebong-ro, Dong-gu, Gwangju 61469, Republic of Korea