1. Dental Research Institute, Seoul National University, Seoul, Republic of Korea.
2. Clinical Dental Research Institute, Seoul National University Dental Hospital, Seoul, Republic of Korea.
3. Regenerative Medicine Research Center, Dalim Tissen Co., Ltd., Seoul, Republic of Korea.
4. Department of Oral and Maxillofacial Surgery, School of Dentistry, BK21 Plus Program, Seoul National University, Seoul, Republic of Korea.