No abstract available
Publication types
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Editorial
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Research Support, N.I.H., Extramural
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Research Support, U.S. Gov't, P.H.S.
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Comment
MeSH terms
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Cholecalciferol / therapeutic use*
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Female
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Humans
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Male
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Respiratory Tract Infections / epidemiology*
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Respiratory Tract Infections / prevention & control*
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Vitamins / therapeutic use*