1. Department of Orthodontics, Dental Research Institute, Pusan National University Dental Hospital, Yangsan, Korea.
2. Department of Management Information Systems, College of Business, Dong-A University, Busan, Korea.
3. Department of Orthodontics, School of Dentistry, Showa University, Tokyo, Japan.
4. Department of Orthodontics, Chang Gung Memorial Hospital, Kaohsiung, Taiwan.
5. Department of Orthodontics, School of Dentistry, University of North Carolina at Chapel Hill, NC, USA.
6. Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Busan, Korea.