1. Private Practice, Gwangju, Korea.
2. Department of Statistics, College of Natural Sciences, Chonnam National University, Gwangju, Korea.
3. Department of Oral Anatomy, School of Dentistry, Chonnam National University, Gwangju, Korea.
4. Dental Science Research Institute, Chonnam National University, Gwangju, Korea.
5. Department of Orthodontics, School of Dentistry, Chonnam National University, Gwangju, Korea.
6. Dental 4D Research Institute, Chonnam National University, Gwangju, Korea.