1. Instructor, Department of Oral and Maxillofacial Radiology, Kangdong Sacred Heart Hospital, Hallym University Medical Center, Seoul, Korea
2. Full-time Lecturer, Department of Oral Radiology, Kyung Hee University, Seoul, Korea
3. Associate Professor and Department Chair, Kyung Hee University, Seoul, Korea
4. Professor, Department of Oral and Maxillofacial Radiology, Kyung Hee University, Seoul, Korea
5. Clinical Fellow, Department of Prosthodontics, Kyung Hee University, Seoul, Korea
6. Associate Professor, Department of Orthodontics, School of Dentistry, Kyung Hee University, Seoul, Korea
7. Associate Clinical Professor and Vice Chair, Division of Orthodontics, Department of Orofacial Science, University of California, San Francisco