1. Department of Removable Prosthodontics and Gerodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
2. Department of Clinical Thanatology and Geriatric Behavioral Science, Osaka University Graduate School of Human Sciences, Osaka, Japan
3. Department of Health Science, Osaka University Graduate School of Medicine, Osaka, Japan
4. Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan
5. Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
6. Department of General Geriatric Medicine, Kawasaki Medical School, Okayama, Japan
7. Japan Environment and Children’s Study Programme Office, National Institute for Environmental Studies, Tsukuba, Japan
8. Department of Social and Preventive Epidemiology, School of Public Health, University of Tokyo, Tokyo, Japan