aDepartment of Social Welfare, Nihon Fukushi University, Aichi, Japan
bCenter for Well-being and Society, Nihon Fukushi University, Nagoya, Japan
cDepartment of Health and Social Behavior, School of Public Health, The University of Tokyo, Tokyo, Japan
dDepartment of International and Community Oral Health, Tohoku University Graduate School of Dentistry, Sendai, Japan
eDepartment of Social and Behavioral Sciences, Harvard School of Public Health, Boston, MA, USA
fDepartment of Community Health and Preventive Medicine, Hamamatsu University School of Medicine, Shizuoka, Japan
gCenter for Preventive Medical Sciences, Chiba University, Chiba, Japan
hCenter for Gerontology and Social Science, National Center for Geriatrics and Gerontology, Aichi, Japan
∗Corresponding author. Department of Social Welfare, Nihon Fukushi University, Okuda, Mihama-cho, Chita-gun, Aichi-Prefecture, 470-3295, Japan.Department of Social WelfareNihon Fukushi UniversityOkuda, Mihama-cho, Chita-gunAichi-Prefecture470-3295Japan masa-s@n-fukushi.ac.jp