1. Department of Oral and Maxillofacial Surgery, Gangnam Severance Hospital, Yonsei University College of Dentistry, Seoul, Korea.
2. Department of Oral Pathology, Oral Cancer Research Institute, Yonsei University College of Dentistry, Seoul, Korea.
3. Department of Oral and Maxillofacial Radiology, Yonsei University College of Dentistry, Seoul, Korea.
4. Department of Dentistry, Yongin Severance Hospital, Yongin, Korea.