title: beta-Carotene supplementation, vitamin D, and cancer risk: a hypothesis.
authors.forename: S B
authors.initials: SB
authors.lastname: Kritchevsky
authors.forename: G G
authors.initials: GG
authors.lastname: Schwartz
authors.forename: D L
authors.initials: DL
authors.lastname: Morris
mesh_terms: D000970:Antineoplastic Agents / Q000494:pharmacology*; D002117:Calcitriol / Q000097:blood*; D002338:Carotenoids / Q000494:pharmacology*; D005527:Food, Fortified; D006801:Humans; D008297:Male; D011471:Prostatic Neoplasms / Q000097:blood*; D019207:beta Carotene
chemical_list: D000970:Antineoplastic Agents; D019207:beta Carotene; D002338:Carotenoids; D002117:Calcitriol