No abstract available
MeSH terms
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Antimutagenic Agents / metabolism
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Antimutagenic Agents / therapeutic use*
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Bronchial Neoplasms / prevention & control*
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Carotenoids / metabolism
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Carotenoids / therapeutic use*
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Clinical Trials as Topic
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Humans
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Risk Factors
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Vitamin A / metabolism
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Vitamin A / therapeutic use*
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beta Carotene
Substances
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Antimutagenic Agents
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beta Carotene
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Vitamin A
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Carotenoids