Health care and medical systems in the United States.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003695:Delivery of Health Care; D004470:Economics, Medical; D005102:Health Expenditures; D006288:Health Planning Organizations / Q000458:organization & administration*; D006296:Health Services / Q000266:history; D006298:Health Services Administration; D006280:Health Workforce; D049711:History, Modern 1601-; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007348:Insurance, Health; D007878:Legislation as Topic; D008875:Middle Aged; D009026:Mortality; D014481:United States; D014483:United States Dept. of Health and Human Services