1. Department of Oral and Maxillofacial Surgery, Dokkyo Medical University School of Medicine, Mibu, Shimo-tsuga, Tochigi, Japan
2. Department of Surgical and Molecular Pathology, Dokkyo Medical University School of Medicine, Mibu, Shimo-tsuga, Tochigi, Japan
3. Department of Pharmacology, Institute of Basic Medical Sciences, The University of Tsukuba, Tsukuba, Ibaragi, Japan