Beta-carotene didn't prevent cancer: what's up doc?
Lippman
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Hong
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D002338:Carotenoids / Q000627:therapeutic use*; D004305:Dose-Response Relationship, Drug; D006801:Humans; D007972:Leukoplakia, Oral / Q000188:drug therapy; D009369:Neoplasms / Q000517:prevention & control*; D014212:Tretinoin / Q000627:therapeutic use; D019207:beta Carotene
D019207:beta Carotene; D002338:Carotenoids; D014212:Tretinoin