1. Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, South Korea
2. Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology and College of Medicine, Seoul National University, Seoul, South Korea
3. Division of Rheumatology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
4. Division of Rheumatology, Jeju National University Hospital, Jeju, South Korea