1. Department of Oral and Maxillofacial Surgery, Tooth Bioengineering National Research Lab, BK21, and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea.
2. Department of Biosystems & Biomaterials Science and Engineering, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea.
3. Department of Otolaryngology, Ajou University, School of Medicine, Suwon, Korea.
4. Department of Oral and Maxillofacial Surgery, School of Medicine, Choongnam National University, Tae-jun, Korea.
5. Department of Dental Biomaterials Science, School of Dentistry, Seoul National University, Seoul, Korea.