1. Section of Pathology, Department of Morphological Biology, Division of Biomedical Sciences Fukuoka Dental College Fukuoka Japan
2. Oral Medicine Research Center Fukuoka Dental College Fukuoka Japan
3. Department of Health Promotion, Division of Oral Pathology Kyushu Dental University Kitakyushu Japan
4. Department of Pathology Saitama Cancer Center Saitama Japan
5. Department of Oral and Maxillofacial Surgery, Faculty of Medicine Oita University Oita Japan
6. Section of Oral Oncology, Department of Oral and Maxillofacial Surgery, Division of Oral and Medical Management Fukuoka Dental College Fukuoka Japan