1. Department of Oral Surgery, Tokyo Metropolitan Komagome Hospital
2. Department of Dentistry and Oral Surgery, Hino Municipal Hospital
3. Department of Dentistry and Oral Surgery, Nattional Hospital Organaization Kasumigaura Medical Center
4. Department of Dentistry and Oral Surgery, School of Medicine, Keio University
5. Department of Pathology, Tokyo Metropolitan Komagome Hospital