1. Research Team for Promoting Independence of the Elderly; Tokyo Metropolitan Institute of Gerontology; Tokyo Japan
2. Graduate School of Medical and Dental Science; Tokyo Medical and Dental University; Tokyo Japan
3. Department of Advanced Medicine; Division of Oral and Dental Surgery; National Center for Geriatrics and Gerontology; Aichi Japan
4. Research Team for Social Participation and Community Health; Tokyo Metropolitan Institute of Gerontology; Tokyo Japan