1. Department of Periodontology, Dental Research Institute, Pusan National University Dental Hospital, Yangsan, Korea.
2. Periodontal Disease Signaling Network Research Center, Dental and Life Science Institute, Pusan National University School of Dentistry, Yangsan, Korea.
3. Department of Oral Pathology, Pusan National University School of Dentistry, Yangsan, Korea.
4. Department of Statistics, Pusan National University College of Natural Sciences, Busan, Korea.
5. Department of Pathology, Pusan National University School of Medicine, Busan, Korea.
6. Department of Internal Medicine, Pusan National University School of Medicine and Pusan National University Hospital, Busan, Korea.