1. Department of Preventive GerontologyCenter for Gerontology and Social Science, National Center for Geriatrics and Gerontology Obu Japan
2. Epidemiology and Prevention GroupCenter for Public Health Sciences, National Cancer Center Tokyo Japan
3. Department of Health and EnvironmentHiyama Subprefectural Bureau, Hokkaido Government Sapporo Japan
4. Graduate School of Health SciencesSapporo Medical University Sapporo Japan
5. Department of Physical Therapy, School of Health SciencesSapporo Medical University Sapporo Japan