1. Department of Orthodontics, College of Dentistry, Wonkwang University, Iksan, Korea.
2. Private Practice, Jeonju, Korea.
3. Department of Dentistry, CHA Gangnam Medical Center, CHA University, Seoul, Korea.
4. Department of Orthodontics, Wonkwang Dental Research Institute, College of Dentistry, Wonkwang University, Iksan, Korea.