1. Assistant Professor, Department of Orthodontics, Graduate School, Kyung Hee University, Seoul, Korea.
2. Adjunct Associate Professor, Department of Orthodontics, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, Calif.
3. Clinical Professor, Department of Orthodontics, Graduate School, Kyung Hee University, Seoul, Korea.
4. Professor and Head, Department of Orthodontics, Graduate School, Kyung Hee University, Seoul, Korea.
5. Clinical Professor, Division of Orthodontics, Department of Orofacial Science, University of California–San Francisco, San Francisco, Calif.