title: A study of the incidence, sex-ratio, laterality and clinical severity in 3,660 probands with facial clefts in Czechoslovakia.
mesh_terms: D002971:Cleft Lip / Q000453:epidemiology*; D002972:Cleft Palate / Q000453:epidemiology*; D003604:Czechoslovakia; D005260:Female; D007839:Functional Laterality; D006801:Humans; D007223:Infant; D008297:Male; D012744:Sex Ratio