1. Department of Oral and Maxillofacial Surgery, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
2. Department of Pathology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
3. Department of Pathology, Children's Cancer Center, National Center for Child Health and Development, Tokyo, Japan
4. Department of Pharmacology, Faculty of Medicine, University of the Ryukyus, Okinawa, Japan
5. Division of Organ Pathology, Faculty of Medicine, Tottori University, Yonago, Japan