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United States
Canada
Massachusetts
Insurance, Health
Single-Payer System
Delivery of Health Care
Medically Uninsured
National Health Insurance, United States
Insurance Coverage
Health Services Accessibility
Health Expenditures
Multivariate Analysis
Universal Coverage
National Health Programs
Quality of Health Care
Medicare
Health Care Costs
Health Care Reform
Medicaid
Health Maintenance Organizations
Co-Publications
97
27
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15
6
5
4
2
1
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