1. Division of Rheumatology, Department of Internal Medicine, Jeju National University School of Medicine, Jeju, Korea.
2. Department of Internal Medicine, Jeju National University School of Medicine, Jeju, Korea.
3. Department of Pathology, Jeju National University School of Medicine, Jeju, Korea.
4. Department of Diagnostic Radiology, Jeju National University School of Medicine, Jeju, Korea.