1. Department of Oral and Maxillofacial Surgery, Dunsan E-comfortable Dental Clinic, Daejeon, Korea
2. Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Korea
3. Department of Orthodontics, Bubu Dental Clinic, Geoje, Korea
4. Department of Oral Medicine, Bubu Dental Clinic, Gumi, Korea
5. Department of Prosthodontics, Kim Min Jeong Dental Clinic, Daegu, Korea
6. Department of Dentistry, Seoul National University, Seoul, Korea