1. Department of Diagnostic Pathology Tsurumi University Dental Hospital Yokohama Japan
2. Department of Diagnostic and Therapeutic Sciences, Division of Pathology Meikai University School of Dentistry Saitama Japan
3. Department of Oral Medicine and Stomatology Tsurumi University School of Dental Medicine Yokohama Japan
4. Center of Oral Clinical Examination Hiroshima University Hospital Hiroshima Japan
5. Department of Anatomic Pathology, Pathological Sciences, Graduate School of Medical Sciences Kyushu University Fukuoka Japan