1. Department of Orthodontics, Graduate School of Clinical Dental Science, The Catholic University of Korea, Seoul, Korea
2. Department of Orthodontics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
3. SantaMonica College, Santa Monica, CA, USA
4. Division of Oral and Maxillofacial Surgery, Department of Dentistry, Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea
5. Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health, A.T. Still University, Mesa, AZ, USA
6. International Scholar, Graduate School of Dentistry, Kyung Hee University, Seoul, Korea
7. Department of Preventive Dental Sciences, College of Dentistry, King Faisal University, Al-Ahsa, Kingdom of Saudi Arabia
8. Department of Postgraduate Studies, Universidad Autonoma del Paraguay, Asuncion, Paraguay