1. Division of Oral Surgery, Faculty of Medicine Nihon University Itabashi‐ku, Tokyo Japan
2. Department of Dentistry and Oral Surgery Tokyo Metropolitan Hiroo Hospital Shibuya‐ku, Tokyo Japan
3. Department of Oral Radiation Oncology, Graduate School of Medical and Dental Sciences Tokyo Medical and Dental University Bunkyo‐ku, Tokyo Japan
4. Department of Physiology, Graduate School of Medicine and Faculty of Medicine Nihon University Itabashi‐ku, Tokyo Japan
5. Department of Maxillofacial Surgery, Graduate School of Medical and Dental Sciences Tokyo Medical and Dental University Bunkyo‐ku, Tokyo Japan