Strange things that happened on the way to the 1990s.
D000293:Adolescent; D001294:Attitude to Health; D006296:Health Services / Q000639:trends*; D006297:Health Services Accessibility / Q000639:trends; D006801:Humans; D007226:Infant Mortality / Q000639:trends; D007231:Infant, Newborn; D011295:Prenatal Care / Q000639:trends; D019966:Substance-Related Disorders / Q000453:epidemiology; D014481:United States