| Affiliation: | 1. Department of International and Community Oral Health, Graduate School of Dentistry, Tohoku University, Sendai, Japan;2. Center for Preventive Medical Sciences, Chiba University, Chiba, Japan;3. Department of Gerontological Evaluation, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology, Obu City, Japan;4. Department of Epidemiology and Public Health, University College London, London, United Kingdom;5. Division of Dental Sociology, Department of Oral Science, Graduate School of Dentistry, Kanagawa Dental University, Kanagawa, Japan |
