1. Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea.
2. Division for Healthcare Technology Assessment Research, National Evidence-based Healthcare Collaborating Agency, Seoul, Korea.
3. Department of Radiology, Ajou University School of Medicine, Suwon, Korea.
4. Department of Oral and Maxillofacial Radiology, Yonsei University College of Dentistry, Seoul, Korea.