Can two-tiered health care work?
D003695:Delivery of Health Care / Q000639:trends*; D005380:Financing, Government; D049673:History, 20th Century; D007348:Insurance, Health / Q000639:trends; D008484:Medicaid / Q000639:trends; D006278:Medicare / Q000191:economics / Q000266:history; D009310:National Health Insurance, United States; D011787:Quality of Health Care / Q000639:trends; D014481:United States