1. Ilsan Ye Dental Clinic, Goyang, Korea.
2. Graduate School of Clinical Dentistry, Ewha Womans University, Seoul, Korea.
3. Department of Oral and Maxillofacial Surgery, School of Medicine and Institute of Health Science, Gyeongsang National University, Jinju, Korea.
4. Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, Korea.
5. Department of Oral and Maxillofacial Surgery, Jaw and Face Surgery Center, On General Hospital, Busan, Korea.