1. Graduate Student, Department of Orthodontics, College of Dentisrty, Yonsei University, Korea.
2. Contract Professor, Department of Mechanical Engineering BK21, Hanyang University, Korea.
3. Assistant Professor, Department of Orthodontics, St. Mary's Hospital, The Catholic University of Korea, Korea.
4. Professor, Department of Orthodontics, Ewha Womans University Mokdong Hospital, Korea.
5. Associate Professor, Department of Orthodontics, College of Dentisrty, Oral Science Research Center, The Institute of Craniofacial Deformity, Yonsei University, Korea.