Health care utilization surveys of the National Center for Health Statistics.
D000553:Ambulatory Care / Q000706:statistics & numerical data; D006296:Health Services / Q000706:statistics & numerical data*; D006801:Humans; D009309:National Center for Health Statistics, U.S.; D009735:Nursing Homes / Q000706:statistics & numerical data; D010351:Patient Discharge; D014481:United States; D014492:United States Public Health Service