No abstract available
MeSH terms
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Cross-Sectional Studies
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Dietary Supplements / statistics & numerical data*
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Female
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Humans
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Infant
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Infant, Newborn
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Male
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Nutrition Surveys / statistics & numerical data*
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Patient Compliance / statistics & numerical data*
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United States
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Vitamin D / administration & dosage*
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Vitamin D Deficiency / prevention & control*