No abstract available
MeSH terms
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Anticarcinogenic Agents / adverse effects
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Anticarcinogenic Agents / therapeutic use*
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Antioxidants / adverse effects
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Antioxidants / therapeutic use*
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Biomarkers, Tumor
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Double-Blind Method
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Head and Neck Neoplasms / radiotherapy*
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Humans
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Multicenter Studies as Topic
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Neoplasms, Radiation-Induced / etiology
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Neoplasms, Radiation-Induced / prevention & control*
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Neoplasms, Second Primary / etiology
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Neoplasms, Second Primary / prevention & control*
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Radiotherapy / adverse effects
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Randomized Controlled Trials as Topic
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Risk Assessment
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Treatment Failure
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Treatment Outcome
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alpha-Tocopherol / therapeutic use*
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beta Carotene / adverse effects
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beta Carotene / therapeutic use*
Substances
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Anticarcinogenic Agents
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Antioxidants
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Biomarkers, Tumor
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beta Carotene
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alpha-Tocopherol