title: Congenital malformation cluster in eastern United States.
mesh_terms: D000013:Congenital Abnormalities / Q000453:epidemiology* / Q000235:genetics; D006330:Heart Defects, Congenital / Q000453:epidemiology; D006801:Humans; D007231:Infant, Newborn; D014314:Trisomy; D014481:United States