1. Graduate Student, Department of Orthodontics, Graduate School of Clinical Dental Science, The Catholic University of Korea, Korea.
2. Assistant Professor, Department of Orthodontics, Graduate School of Clinical Dental Science, The Catholic University of Korea, Korea.
3. Professor, Department of Maxillofacial Surgery, Graduate School of Clinical Dental Science, The Catholic University of Korea, Korea.
4. Professor, Department of Orthodontics, Graduate School of Clinical Dental Science, The Catholic University of Korea, Korea.