No abstract available
Publication types
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Clinical Trial
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Randomized Controlled Trial
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Carcinoma, Squamous Cell / drug therapy*
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Digestive System Neoplasms / prevention & control
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Double-Blind Method
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Follow-Up Studies
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Head and Neck Neoplasms / drug therapy*
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Humans
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Isotretinoin / therapeutic use*
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Neoplasms, Second Primary / prevention & control*
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Respiratory Tract Neoplasms / prevention & control
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Survival Analysis