title: Increased frequency of neural tube defects in sibs of children with other malformations.
mesh_terms: D000015:Abnormalities, Multiple / Q000453:epidemiology / Q000235:genetics; D002648:Child; D002971:Cleft Lip / Q000235:genetics; D002972:Cleft Palate / Q000235:genetics; D000013:Congenital Abnormalities / Q000453:epidemiology / Q000235:genetics*; D006801:Humans; D009436:Neural Tube Defects / Q000453:epidemiology / Q000235:genetics*; D011792:Quebec; D014138:Tracheoesophageal Fistula / Q000235:genetics; D006113:United Kingdom