1. Department of International and Community Oral Health Tohoku University Graduate School of Dentistry Sendai Japan
2. Department of Oral Health Promotion Graduate School of Medical and Dental Sciences Tokyo Medical and Dental University Tokyo Japan
3. Division for Regional Community Development Liaison Center for Innovative Dentistry Graduate School of Dentistry Tohoku University Sendai Japan
4. Department of Health Policy Science Graduate School of Medical Science Yamagata University Yamagata Japan
5. Cancer Control Center Osaka International Cancer Institute Osaka Japan
6. Department of Social Preventive Medical Sciences Center for Preventive Medical Sciences Chiba University Chiba Japan
7. Department of Gerontological Evaluation Center for Gerontology and Social Science National Center for Geriatrics and Gerontology Obu City Japan