1. Department of Social Science, Center for Gerontology and Social Science, Research Institute, National Center for Geriatrics and Gerontology
2. Department of Health Policy Science, Graduate School of Medical Science, Yamagata University
3. Tokyo Metropolitan Tama-Hokubu Medical Center
4. Faculty of Social Welfare, Nihon Fukushi University
5. Department of Social Preventive Medical Sciences, Center for Preventive Medical Sciences, Chiba University