1. Seoul White Dental Clinic Seoul South Korea
2. Department of Preventive Dental Scinces, College of Dentistry King Faisal University Al Hufuf Saudi Arabia
3. Department of Postgraduate Studies Universidad Autonóma del Paraguay Asunción Paraguay
4. Joo Il Kang Dental Clinic Seoul South Korea
5. Department of Orthodontics, Seoul St. Mary’s Hospital, College of Medicine The Catholic University of Korea Seoul South Korea
6. Department of Orthodontics, Section of Dentistry Seoul National University Bundang Hospital Seongnam South Korea
7. Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health A.T. Still University Mesa Arizona USA
8. Graduate School of Dentistry Kyung Hee University Seoul South Korea