1. Department of Geriatric Medicine, Graduate School of Medicine; The University of Tokyo; Tokyo Japan
2. Institute of Gerontology; The University of Tokyo; Tokyo Japan
3. Federation of National Public Service Personnel Mutual Aid Associations Toranomon Hospital; Tokyo Japan
4. Division of Clinical Oral Rehabilitation; The Nippon Dental University Graduate School of Life Dentistry at Tokyo; Tokyo Japan
5. Department of Surgery & Palliative Medicine; Fujita Health University School of Medicine; Toyoake City Japan
6. Tokyo Metropolitan Institute of Gerontology; Tokyo Japan
7. Division of Health Promotion and Exercise; National Institute of Health and Nutrition; Tokyo Japan