Editorial: Congenital heart-disease: incidence and aetiology.
D004200:Diseases in Twins; D004374:Ductus Arteriosus, Patent / Q000209:etiology; D004777:Environment; D005260:Female; D006330:Heart Defects, Congenital / Q000453:epidemiology* / Q000209:etiology / Q000235:genetics; D006801:Humans; D008297:Male; D011247:Pregnancy; D011248:Pregnancy Complications / Q000150:complications; D014430:Twins, Monozygotic