No abstract available
MeSH terms
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Antioxidants / therapeutic use*
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Carcinoma, Squamous Cell / drug therapy*
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Carcinoma, Squamous Cell / prevention & control*
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Carotenoids / therapeutic use*
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Head and Neck Neoplasms / drug therapy*
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Head and Neck Neoplasms / prevention & control*
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Humans
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Isotretinoin / therapeutic use*
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beta Carotene
Substances
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Antioxidants
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beta Carotene
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Carotenoids
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Isotretinoin