1. Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health, A.T. Still University, Mesa, AZ, USA.
2. Graduate School of Dentistry, Kyung Hee University, Seoul, Korea.
3. Department of Orthodontics, The Catholic University of Korea, Seoul St. Mary's Hospital, Seoul, Korea.
4. Department of Mechanical Engineering, Nagoya Institute of Technology, Nagoya, Japan.
5. Private Practice, Jinju, Korea.
6. Department of Orthodontics, School of Dentistry, Wonkwang University, Iksan, Korea.
7. Wonkwang Dental Research Institute, School of Dentistry, Wonkwang University, Iksan, Korea.