1. Department of Oral and Maxillofacial Surgery, Jeju National University Hospital, Jeju National University School of Medicine, Jeju, Korea.
2. Department of Oral and Maxillofacial Surgery, School of Dentistry, Gangneung-Wonju National University, Gangneung, Korea.
3. Department of Oral and Maxillofacial Radiology, School of Dentistry, Gangneung-Wonju National University, Gangneung, Korea.
4. Department of Anesthesiology and Pain Medicine, Jeju National University School of Medicine, Jeju, Korea.