1. Laboratory of Autoimmunology, Department of Anatomy and Cell Biology, Hanyang University College of Medicine, Seoul 04763, Korea.
2. Department of Pathology, Hanyang University College of Medicine, Seoul 04763, Korea.
3. Department of Medical Life Science, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea.
4. Division of Rheumatology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea.