The elderly as healthcare consumers.
D000368:Aged; D002908:Chronic Disease / Q000453:epidemiology; D003625:Data Collection; D006262:Health; D006301:Health Services Needs and Demand / Q000639:trends; D006299:Health Services for the Aged / Q000706:statistics & numerical data*; D006304:Health Status; D006801:Humans; D007326:Institutionalization; D006278:Medicare; D014481:United States