1. Department of Orthodontics, College of Dentistry, Wonkwang University, Iksan, Korea.
2. Private Practice, Iksan, Korea.
3. Department of Orthodontics, College of Dentistry, Wonkwang University Dental Hospital, Sanbon, Korea.
4. Department of Orthodontics, College of Dentistry, Wonkwang University Dental Hospital, Daejeon, Korea.
5. Department of Orthodontics, College of Dentistry, Wonkwang Dental Research Institute, Wonkwang University, Iksan, Korea.