1. Division of Rheumatology, Department of Internal Medicine, Pusan National University Hospital, Pusan National University School of Medicine, Busan 49241, Republic of Korea
2. Biomedical Research Institute, Pusan National University Hospital, Busan 49241, Republic of Korea
3. Division of Rheumatology, Department of Internal Medicine, College of Medicine, Kosin University, Busan 49104, Republic of Korea
4. Division of Rheumatology, Department of Internal Medicine, Pusan National University Yangsan Hospital, School of Medicine, Pusan National University, Yangsan 50612, Republic of Korea