1. Department of Research; Heisei Medical Welfare Group Research Institute; Tokyo Japan
2. Division of Policy Evaluation, Department of Health Policy; Research Institute, National Center for Child Health and Development; Tokyo Japan
3. Department of Rehabilitation Medicine; Nihon University School of Medicine; Tokyo Japan
4. Department of Rehabilitation Medicine; Mie University Graduate School of Medicine; Mie Japan
5. Infectious Disease Surveillance Center at the National Institute of Infectious Diseases; Tokyo Japan
6. Department of Dysphagia Rehabilitation; Nihon University School of Dentistry; Tokyo Japan
7. Graduate School of Public Health; St. Luke’s International University; Tokyo Japan
8. Comprehensive Unit for Health Economic Evidence Review and Decision Support (CHEERS), Research Organization of Science and Technology; Ritsumeikan University; Kyoto Japan
9. Department of Health Services Research, Faculty of Medicine; University of Tsukuba; Tsukuba Japan