1. Lecturer, Section of Orthodontics, Graduate School of Dental Science, Kyushu University, Fukuoka, Japan
2. Graduate Student, Department of Orthodontics, Pusan National University Dental Hospital, Yangsan, Korea
3. Resident, Section of Orthodontics, Graduate School of Dental Science, Kyushu University, Fukuoka, Japan
4. Associate Professor, Department of Orthodontics, Pusan National University Dental Hospital, Yangsan, Korea
5. Professor, Department of Orthodontics, Pusan National University Dental Hospital, Yangsan, Korea
6. Professor, Section of Orthodontics, Graduate School of Dental Science, Kyushu University, Fukuoka, Japan