1. Department of General Dentistry, Hiroshima University Hospital, 1-2-3, Kasumi, Minami-Ku, Hiroshima 734-8551, Japan
2. Department of Public Oral Health, Program of Oral Health Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan
3. Department of Hematology and Oncology, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima 734-8551, Japan
4. Department of Internal Medicine, Karatsu Red Cross Hospital, Karatsu 847-8588, Japan
5. Department of Anesthesiology, Hiroshima General Hospital, Hiroshima 734-8551, Japan
6. Department of Oral Oncology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan
7. Department of Oral and Maxillofacial Radiology, Hiroshima University Hospital, Hiroshima 734-8551, Japan
8. Department of Program of Dentistry, School of Dentistry, Hiroshima University, Hiroshima 734-8551, Japan
9. Center of Oral Clinical Examination, Hiroshima University Hospital, Hiroshima 734-8551, Japan
10. Department of Clinical Practice and Support, Hiroshima University Hospital, Hiroshima 734-8551, Japan
11. Department of Oral and Maxillofacial Radiology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8553, Japan
12. Department of Infectious Diseases, Hiroshima University Hospital, Hiroshima 734-8551, Japan