1. BK21 Plus Project, Department of Medical Science, College of Medicine, Yonsei University, Seoul 03772, Republic of Korea
2. Division of Rheumatology, Department of Internal Medicine, Yongin Severance Hospital, College of Medicine, Yonsei University, Yongin 16995, Republic of Korea
3. Division of Rheumatology, Department of Internal Medicine, Severance Hospital, College of Medicine, Yonsei University, Seoul 03772, Republic of Korea
4. Institute for Immunology and Immunological Diseases, College of Medicine, Yonsei University, Seoul 03772, Republic of Korea