1. Resident, Department of Orthodontics, Kangdong Sacred Heart Hospital, Hallym University Medical Center, Korea.
2. Associate Professor, Department of Orthodontics, Kangdong Sacred Heart Hospital, Hallym University Medical Center, Korea.
3. Associate Professor, Department of Orthodontics, School of Dentistry, Seoul National University, Korea.
4. Professor, Department of Orthodontics, School of Dentistry, Dankook University, Korea.