1. Department of Oral and Maxillofacial Pathobiology; Institute of Biomedical and Health Sciences; Hiroshima University; Hiroshima Japan
2. Department of Oral and Maxillofacial Radiology; Institute of Biomedical and Health Sciences, Hiroshima University; Hiroshima Japan
3. Department of Molecular Oral Medicine and Maxillofacial Surgery; Institute of Biomedical and Health Sciences; Hiroshima University; Hiroshima Japan
4. Center of Oral Clinical Examination; Hiroshima University Hospital; Hiroshima Japan