1. Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
2. Division of Infectious Disease, Department of Internal Medicine, College of Medicine, Chosun University, Gwangju, Korea
3. Department of Oral and Maxillofacial Radiology, School of Dentistry, Chosun University, Gwangju, Korea