No abstract available
MeSH terms
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China / epidemiology
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Cohort Studies
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Confounding Factors, Epidemiologic
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Female
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Folic Acid / administration & dosage*
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Humans
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Neural Tube Defects / epidemiology
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Neural Tube Defects / prevention & control*
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Patient Compliance
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Prenatal Care
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Prevalence
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Risk Factors