1. Professor, Department of Orthodontics, Graduate School of Clinical Dentistry, Korea University, Korea.
2. Private Practice.
3. Graduate Student, Department of Orthodontics, Graduate School of Clinical Dentistry, Korea University, Korea.
4. Clinical Instructor, Department of Orthodontics, Graduate School of Clinical Dentistry, Korea University, Korea.
5. Associate Professor, Department of Orthodontics, School of Dentistry, Seoul National University, Korea.