1. Postgraduate Student, Department of Orthodontics, School of Dentistry, Kyung Hee University, Seoul, Korea.
2. Assistant Professor, Department of Orthodontics, School of Dentistry, Kyung Hee University, Seoul, Korea.
3. Associate Professor, Department of Orthodontics, School of Dentistry, Kyung Hee University, Seoul, Korea.
4. Clinical Associate Professor, Department of Orthodontics, School of Dentistry, Seoul National University, Seoul, Korea.
5. Associate Professor and Chairman, Department of Orthodontics, School of Dentistry, Kyung Hee University, Seoul, Korea.
6. Clinical Professor and Chair, Division of Orthodontics, Department of Orofacial Science, University of California–San Francisco, San Francisco, Calif.