Some international trends in the incidence of neural tube defects.
D000757:Anencephaly / Q000453:epidemiology; D001315:Australia; D005060:Europe; D006801:Humans; D007231:Infant, Newborn; D009436:Neural Tube Defects / Q000453:epidemiology*; D016136:Spina Bifida Occulta / Q000453:epidemiology; D006113:United Kingdom; D014481:United States