1. Department of Oral and Maxillofacial Surgery, Daejeon Dental Hospital, Wonkwang University, Daejeon
2. Wonkwang Bone Regeneration Research Institute, Daejoen Dental Hospital, College of Dentistry, Wonkwang University, Daejeon, Republic of Korea
3. Wonkwang Dental Research Institute, Wonkwang Universtiy, Iksan, Republic of Korea