1. Department of Oral and Maxillofacial Surgery, Chosun University Dental Hospital, Gwangju, Korea
2. Department of Oral and Maxillofacial Surgery, College of Dentistry, Chosun University, Gwangju, Korea
3. Department of Otolaryngology-Head and Neck Surgery, Chosun University College of Medicine, Gwangju, Korea
4. Department of Oral Medicine, College of Dentistry, Chosun University, Gwangju, Korea