title: Concordance-discordance rate in twins unilateral clefts.
mesh_terms: D002971:Cleft Lip / Q000235:genetics*; D002972:Cleft Palate / Q000235:genetics*; D004200:Diseases in Twins; D006801:Humans; D010641:Phenotype; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic