1 Department of Oral and Maxillofacial Surgery, Asan Medical Center, Seoul, Korea.
2 Department of Oral and Maxillofacial Surgery, Section of Dentistry, Armed Forces Capital Hospital, Seongnam, Korea.
3 Department of Oral and Maxillofacial Surgery, School of Dentistry and Institute of Oral Bioscience, Research institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital, Chonbuk National University, Jeonju, Korea.
4 Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Korea.
5 Department of Oral and Maxillofacial Surgery, Institute of Oral Health Science, Ajou University School of Medicine, Suwon, Korea.