1. Center for Preventive Medical Sciences, Chiba University, Chiba, Japan
2. School of Nursing, Tokyo Women’s Medical University, Tokyo, Japan
3. Department of Preventive Medicine and Public Health, Tokyo Medical University, Tokyo, Japan
4. Department of Social Welfare, Nihon Fukushi University, Aichi, Japan
5. Center for Well-being and Society, Nihon Fukushi University, Aichi, Japan
6. Graduate School of Medical and Pharmaceutical Sciences, Chiba University, Chiba, Japan
7. Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology, Aichi, Japan