1. Tokyo Metropolitan Institute of Gerontology Itabashi‐ku Japan
2. Graduate School of Human Sciences Osaka University Suita Japan
3. Department of Oral Health Matsumoto Dental University Shiojiri Japan
4. Department of Health Innovation Aino University Junior College Ibaraki Japan
5. Tokyo Women’s Medical University Shinjuku‐ku Japan
6. Center for Southeast Asian Studies Kyoto University Kyoto Japan
7. Department of Health and Sports Science Faculty of Health Science and Technology Kawasaki University of Medical Welfare Kurashiki Japan
8. Division of Preventive Dentistry Department of Oral Health Science Niigata University Graduate School of Medical and Dental Sciences Niigata Japan