1. Clinical Professor, Department of Orthodontics, SMG-SNU Boramae Medical Center, Seoul, Korea.
2. Clinical Professor, Department of Dentistry, SMG-SNU Boramae Medical Center, Seoul, Korea.
3. Research Fellow, Department of Dental Services Management and Informatics, Graduate School of Dentistry, Seoul National University, Seoul, Korea.
4. Research Fellow, Department of Biostatistics, The Catholic University of Korea, College of Medicine, Seoul, Korea.
5. Clinical Associate Professor, Department of Oral and Maxillofacial Surgery, The Catholic University of Korea, Yeouido St. Mary's Hospital, Seoul, Korea.