title: Malformation frequencies in sibs of atresia cases.
mesh_terms: D004933:Esophageal Atresia / Q000453:epidemiology* / Q000235:genetics; D006801:Humans; D007231:Infant, Newborn; D007409:Intestinal Atresia / Q000453:epidemiology* / Q000235:genetics; D009436:Neural Tube Defects / Q000453:epidemiology* / Q000235:genetics; D009664:Norway