No abstract available
Publication types
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Letter
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Research Support, N.I.H., Extramural
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Research Support, U.S. Gov't, Non-P.H.S.
MeSH terms
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Databases, Factual
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Dietary Supplements
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Drug Labeling / methods*
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Drug Labeling / standards*
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National Institutes of Health (U.S.)
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United States
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Vitamin A*
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beta Carotene*