1. Division of Rheumatology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea.
2. Division of Rheumatology, Department of Internal Medicine, and Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, Republic of Korea.
3. Division of Endocrinology and Metabolism, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Republic of Korea.
4. Division of Rheumatology, Department of Internal Medicine, and Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, Republic of Korea. sangwonlee@yuhs.ac