1. Diabetes and Metabolism Information Center, Research Institute; Center for Global Health and Medicine; Tokyo Japan
2. Department of Public Health/Health Policy, Graduate School of Medicine; The University of Tokyo; Tokyo Japan
3. Department of Health Services Research, Faculty of Medicine; University of Tsukuba; Ibaraki Japan
4. Human Care Research Team; Tokyo Metropolitan Institute of Gerontology; Tokyo Japan
5. Faculty of Medicine; University of Tsukuba; Ibaraki Japan
6. Department of Health and Welfare Services; National Institute of Public Health; Saitama Japan
7. Faculty of Political Science and Economics; Waseda University; Tokyo Japan