No abstract available
MeSH terms
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Animals
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Antioxidants
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Ascorbic Acid / therapeutic use*
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Combined Modality Therapy
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Gastrointestinal Neoplasms / drug therapy
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Gastrointestinal Neoplasms / etiology
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Gastrointestinal Neoplasms / prevention & control
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Humans
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Neoplasms* / drug therapy
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Neoplasms* / etiology
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Neoplasms* / prevention & control
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Neoplasms* / radiotherapy
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Nitrosamines / adverse effects
Substances
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Antioxidants
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Nitrosamines
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Ascorbic Acid