1. Department of Oral and Maxillofacial Radiology, Graduate School, Kyung Hee University, Seoul, Korea
2. Department of Surgery, Division of Plastic and Reconstructive Surgery, Craniofacial and Airway Orthodontic Clinic, Stanford University School of Medicine, Lucile Packard Children’s Hospital, Palo Alto
3. Department of Orthodontics, Graduate School, Kyung Hee University, Seoul, Korea
4. Department of Dental Education, Graduate School, Kyung Hee University, Seoul, Korea