1. Research Department, Institute for Health Economics and Policy, Association for Health Economics Research and Social Insurance and Welfare
2. Department of Health Services Research, Faculty of Medicine, University of Tsukuba
3. National Institute of Public Health
4. Division of Health Service for the Disabled, National Rehabilitation Center
5. Institute of Gerontology, The University of Tokyo
6. Department of Health Policy and Management, School of Medicine, Keio University
7. Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology