Affiliation: | 1. Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang-si, Republic of Korea;2. Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, Republic of Korea;3. Department of Oral and Maxillofacial Surgery, Daejeon Dental Hospital, College of Dentistry, Wonkwang University, Daejeon, Korea |