1. Department of Oral and Maxillofacial Radiology, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
2. Department of Orthodontics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
3. Department of Oral and Maxillofacial Radiology, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, Republic of Korea