The origins of the American hospital system.
D002608:Charities / Q000266:history; D049672:History, 19th Century; D049673:History, 20th Century; D006739:Hospital Administration / Q000266:history; D006761:Hospitals / Q000266:history*; D006788:Hospitals, Voluntary / Q000266:history; D011203:Poverty; D014481:United States