1. Department of Rehabilitation; St Marianna University School of Medicine; Toyoko Hospital; Tokyo Japan
2. Department of Clinical Epidemiology and Health Economics; School of Public Health; The University of Tokyo; Tokyo Japan
3. Department of Health Policy and Informatics; Tokyo Medical and Dental University Graduate School of Medicine; Tokyo Japan
4. Department of Rehabilitation; National Center for Global Health and Medicine; Tokyo Japan
5. Department of Rehabilitation; Tokyo Metropolitan Geriatric Hospital; Tokyo Japan