Challenge '75.
D003695:Delivery of Health Care; D006123:Group Practice; D006279:Health Maintenance Organizations / Q000331:legislation & jurisprudence; D006285:Health Planning / Q000331:legislation & jurisprudence; D009310:National Health Insurance, United States; D010820:Physicians / Q000600:supply & distribution; D011366:Professional Review Organizations / Q000331:legislation & jurisprudence; D014481:United States