1. Department of Prosthodontics, Gerontology and Oral Rehabilitation Osaka University Graduate School of Dentistry Osaka Japan
2. National Center for Geriatrics and Gerontology Research Institute Aichi Japan
3. Research Team for Promoting Independence and Mental Health Tokyo Metropolitan Institute of Gerontology Tokyo Japan
4. Department of Clinical Thanatology and Geriatric Behavioral Science Osaka University Graduate School of Human Sciences Osaka Japan
5. Department of Geriatric and General Medicine Osaka University Graduate School of Medicine Osaka Japan
6. Division of Health Sciences Osaka University, Graduate School of Medicine Osaka Japan
7. Research Team for Human Care Tokyo Metropolitan Institute of Gerontology Tokyo Japan
8. Department of Preventive Medicine and Epidemiology National Cerebral and Cardiovascular Center Osaka Japan