No abstract available
MeSH terms
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Carotenoids* / blood
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Clinical Trials as Topic / methods
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Diet*
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Esophageal Neoplasms / epidemiology
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Fruit
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Humans
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Lung Neoplasms / blood
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Lung Neoplasms / epidemiology
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Male
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Neoplasms / epidemiology*
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Neoplasms / prevention & control
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Risk Factors
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Stomach Neoplasms / epidemiology
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Vegetables
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Vitamins*
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beta Carotene
Substances
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Vitamins
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beta Carotene
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Carotenoids