1. Department of Oral and Maxillofacial Surgery, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea
2. Laboratory for the Study of Regenerative Dental Medicine, Department of Oral Histology-Developmental Biology, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea
3. Department of Periodontology, School of Dentistry, Wonkwang University, Jeollabuk-do, Republic of Korea