The geographical distribution of neural tube defects and oral clefts.
D002971:Cleft Lip / Q000453:epidemiology*; D002972:Cleft Palate / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D009436:Neural Tube Defects / Q000453:epidemiology*; D044469:Racial Groups; D044465:White People