Health insurance in the United States: implications for the United Kingdom.
D054598:Blue Cross Blue Shield Insurance Plans / Q000266:history; D006279:Health Maintenance Organizations / Q000266:history; D049673:History, 20th Century; D007348:Insurance, Health / Q000191:economics* / Q000266:history; D007349:Insurance, Health, Reimbursement; D006278:Medicare; D006113:United Kingdom; D014481:United States