1. Department of Oral Surgery, National Hospital Organization Kure Medical Center and Chugoku Cancer Center
2. Department of Oral and Maxillofacial Surgery, Division of Dental Sciences, Biomedical Sciences Major Graduate School of Biomedical & Health Sciences, Hiroshima University
3. Center of Oral Clinical Examination, Hiroshima University Hospital
4. Department of Public Oral Health, Program of Oral Health Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University