1. Assistant Professor, Department of Orthodontics, Oral Biology Research Institute, Kyung Hee University School of Dentistry, Seoul, Korea.
2. Graduate Student, Department of Orthodontics, Kyung Hee University School of Dentistry, Seoul, Korea.
3. Clinical Fellow, Department of Orthodontics, Kyung Hee University School of Dentistry, Seoul, Korea.
4. Private Practice, Ye2rang Dental Clinic, Seoul, South Korea.
5. Professor and Chairman, Department of Orthodontics, Oral Biology Research Institute, Kyung Hee University School of Dentistry, Seoul, Korea.