1. Division of Pathology, Department of Maxillofacial Diagnostic Science, Kanagawa Dental College, Kanagawa, Japan.
2. Research Institute of Salivary Gland and Health Medicine, Kanagawa Dental College, Kanagawa, Japan.
3. Department of Oral Pathology, Kanagawa Dental College Postgraduate School, Kanagawa, Japan.
4. Deparment of Pathology, Yokosuka Kyousai Hospital, Kanagawa, Japan.
5. Division of Orthodontics, Department of Craniofacial Growth and Development Dentistry, Kanagawa Dental College, Kanagawa, Japan.