Anencephalus and spina bifida in Belfast (1964-1968).
D000757:Anencephaly / Q000150:complications / Q000453:epidemiology*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D009660:Northern Ireland; D012189:Retrospective Studies; D016135:Spinal Dysraphism / Q000150:complications / Q000453:epidemiology*