A double-blind randomized trial with beta-carotene and retinol in persons at high risk of lung cancer due to occupational asbestos exposures and/or cigarette smoking.
Omenn
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GS
D000368:Aged; D001194:Asbestos / Q000009:adverse effects*; D002338:Carotenoids / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D004781:Environmental Exposure; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000517:prevention & control*; D008297:Male; D008875:Middle Aged; D011897:Random Allocation; D012107:Research Design; D012907:Smoking / Q000009:adverse effects*; D014801:Vitamin A / Q000627:therapeutic use*
D014801:Vitamin A; D001194:Asbestos; D002338:Carotenoids