1. Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea.
2. Department of Oral and Maxillofacial Surgery, Ilsan Paik Hospital, Inje University, Goyang, Korea.
3. Department of Oral and Maxillofacial Radiology, BK21 Craniomaxillofacial Life Science, and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea.
4. Interdisciplinary Program in Radiation Applied Life Science Major, College of Medicine, Seoul National University, Seoul, Korea.
5. Department of Oral Anatomy, BK21 Craniomaxillofacial Life Science, and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea.