State birth defects surveillance program directory.
D000013:Congenital Abnormalities / Q000453:epidemiology*; D006801:Humans; D007231:Infant, Newborn; D011159:Population Surveillance; D012042:Registries; D013219:State Government; D013220:State Health Planning and Development Agencies / Q000331:legislation & jurisprudence; D014481:United States / Q000453:epidemiology