1. Postgraduate Student, Department of Orthodontics, School of Dentistry, Kyung Hee University, Korea.
2. Clinical Associate Professor, Department of Orthodontics, School of Dentistry, Kyung Hee University, Korea.
3. Professor and Chairman, Department of Orthodontics, School of Dentistry, Kyung Hee University, Korea.
4. Professor and Chairman, Department of Dentistry, School of Medicine, Ajou University, Korea.
5. Assistant Professor, Department of Orthodontics, School of Dentistry, Kyung Hee University, Korea.
6. Director, Department of Craniofacial Orthodontics, Childrens' Hospital of Phildelphia, USA.
7. Associate Professor, Department of Orthodontics, School of Dentistry, Kyung Hee University, Korea.