1. Department of Dentistry and Oral Surgery National Center for Geriatrics and Gerontology Obu Japan
2. Research Team for Promoting Independence and Mental Health Tokyo Metropolitan Institute of Gerontology Tokyo Japan
3. Gerodontology, Department of Oral Health Science, Faculty of Dental Medicine Hokkaido University Sapporo Japan
4. Japan Environment and Children's Study Programme Office National Institute for Environmental Studies Ibaraki Japan
5. Research Team for Social Participation and Community Health Tokyo Metropolitan Institute of Gerontology Tokyo Japan
6. Research Team for Human Care Tokyo Metropolitan Institute of Gerontology Tokyo Japan
7. Faculty of Health Care Takasaki University of Health and Welfare Gunma Japan
8. Department of Social Medicine Hirosaki University School of Medicine Aomori Japan
9. Graduate School of Nutrition and Health Science Kagawa Nutrition University Sakato Japan
10. Tokyo Metropolitan Geriatric Hospital Tokyo Japan