1. Division of Rheumatology, Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea
2. Division of Rheumatology, Department of Internal Medicine, Gyeongsang National University School of Medicine, Gyeongsang National University Changwon Hospital, Changwon, Korea
3. Division of Rheumatology, Department of Internal Medicine, Pusan National University Hospital, Pusan National University School of Medicine, Busan, Korea
4. Biomedical Research Institute, Pusan National University Hospital, Busan, Korea