title: Letter to the editor: frequency of congenital malformations in newborn children.
authors: Harold
authors: H
authors: Kalter
mesh_terms: D000013:Congenital Abnormalities / Q000453:epidemiology*; D005060:Europe / Q000453:epidemiology; D005260:Female; D006801:Humans; D015994:Incidence; D007231:Infant, Newborn; D014481:United States / Q000453:epidemiology