1. Resident, Department of Periodontology, Dental Hospital, Veterans Health Service Medical Center, Seoul, Republic of Korea
2. Research Assistant, Research Institute of Veterans Health Service Medical Center, Seoul, Republic of Korea
3. Professor, Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, Republic of Korea
4. Chair, Department of Laboratory Medicine, Veterans Health Service Medical Center, Seoul, Republic of Korea
5. Chair, Department of Periodontology, Dental Hospital, Veterans Health Service Medical Center, Seoul, Republic of Korea