1. Dental Hygienist Section, Nihon University School of Dentistry Dental Hospital
2. Department of Periodontology, Nihon University School of Dentistry
3. Division of Advanced Dental Treatment, Dental Research Center, Nihon University School of Dentistry
4. Department of Oral and Maxillofacial Surgery, Nihon University School of Dentistry
5. Department of Comprehensive Dentistry and Clinical Education, Nihon University School of Dentistry