No abstract available
MeSH terms
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Adolescent
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Adult
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Female
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Folic Acid Deficiency / epidemiology*
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Folic Acid Deficiency / prevention & control
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Germany
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Health Surveys*
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Humans
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Infant, Newborn
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Neural Tube Defects / etiology
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Neural Tube Defects / prevention & control
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Pregnancy
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Reference Values
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Risk Factors