Affiliation: | 1. Department of Orthodontics, School of Dentistry, Dental Research Institute, Pusan National University, , Yangsan, South Korea;2. Biomedical Research Institute, Pusan National University Hospital, , Busan, South Korea;3. Department of Oral & Maxillofacial Radiology, School of Dentistry, Pusan National University, , Yangsan, South Korea |