1. Department of Oral and Maxillofacial Surgery, Clinical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
2. Section of Oral Pathology, Division of Oral Health Sciences, Department of Oral Restitution, Graduate School Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8549, Japan
3. Section of Oral and Maxillofacial Surgery, Division of Oral Health Sciences, Department of Oral Restitution, Graduate School Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8549, Japan
4. Department of Pathology, Life System Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan