title: Cancer prevention. Beta-carotene: helpful or harmful?
authors.forename: R
authors.initials: R
authors.lastname: Nowak
mesh_terms: D002338:Carotenoids / Q000009:adverse effects* / Q000627:therapeutic use*; D005387:Finland; D006801:Humans; D008175:Lung Neoplasms / Q000209:etiology* / Q000517:prevention & control; D008297:Male; D016032:Randomized Controlled Trials as Topic; D012907:Smoking / Q000009:adverse effects; D019207:beta Carotene
chemical_list: D019207:beta Carotene; D002338:Carotenoids