Vitamin A, beta-carotene, and the risk of cancer.
Graham
S
S
D002338:Carotenoids / Q000008:administration & dosage*; D006801:Humans; D009369:Neoplasms / Q000517:prevention & control*; D012307:Risk Factors; D014801:Vitamin A / Q000008:administration & dosage*; D019207:beta Carotene
D019207:beta Carotene; D014801:Vitamin A; D002338:Carotenoids