Current trends in the prevalence at birth of neural tube defects in Singapore.
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D000757:Anencephaly / Q000453:epidemiology; D004677:Encephalocele / Q000453:epidemiology; D006801:Humans; D007231:Infant, Newborn; D009436:Neural Tube Defects / Q000453:epidemiology*; D012846:Singapore; D016136:Spina Bifida Occulta / Q000453:epidemiology