title: Beta-carotene didn't prevent cancer: What's up, doc.
authors.forename: K
authors.initials: K
authors.lastname: Smigel
mesh_terms: D002338:Carotenoids / Q000627:therapeutic use*; D004032:Diet; D006801:Humans; D007972:Leukoplakia, Oral / Q000188:drug therapy; D009369:Neoplasms / Q000517:prevention & control*; D014212:Tretinoin / Q000627:therapeutic use; D019207:beta Carotene
chemical_list: D019207:beta Carotene; D002338:Carotenoids; D014212:Tretinoin