1. Department of Oral and Maxillofacial Surgery, Yonsei University College of Dentistry, Seoul, Korea.
2. Department of Oral and Maxillofacial Surgery, Wonkwang University Sanbon Hospital, Gunpo, Korea.
3. Oral Cancer Research Institute, Yonsei University College of Dentistry, Seoul, Korea.
4. Research Institute for Dental Biomaterials & Bioengineering, Yonsei University College of Dentistry, Seoul, Korea.