1. Division of Rheumatology, Department of Internal Medicine, Institute for Immunology and Immunologic Diseases, Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
2. Division of Rheumatology, Department of Internal Medicine, Institute for Immunology and Immunologic Diseases, Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea,
3. Division of Nephrology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea