1. Department of Periodontology, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Korea.
2. Division of Statistics, Medical Research Collaborating Center, Seoul National University Bundang Hospital, Seongnam, Korea.
3. Department of Periodontology, Dankook University Jukjeon Dental Hospital, Yongin, Korea.
4. Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Korea.
5. Division of Rheumatology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
6. Department of Molecular Medicine and Biopharmaceutical Sciences, BK21 Plus Graduate School of Convergence Science and Technology, Medical Research Institute, Seoul National University College of Medicine, Seoul, Korea.
7. Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
8. Division of Allergy and Clinical Immunology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.