1. Department of Dental Anesthesiology, Division of Oral and Maxillofacial Surgery and Oral Medicine Hiroshima University Hospital Hiroshima Japan
2. Department of Dental Anesthesiology, Graduate School of Biomedical and Health Sciences Hiroshima University Hiroshima Japan
3. Department of Oral and Maxillofacial Surgery, Graduate School of Biomedical and Health Sciences Hiroshima University Hiroshima Japan
4. Department of Oral Oncology, Graduate School of Biomedical and Health Sciences Hiroshima University Hiroshima Japan