title: 'Natural' cancer prevention trial halted.
authors.forename: K
authors.initials: K
authors.lastname: Peterson
mesh_terms: D016588:Anticarcinogenic Agents / Q000627:therapeutic use*; D001194:Asbestos / Q000009:adverse effects; D002338:Carotenoids / Q000009:adverse effects / Q000627:therapeutic use*; D018849:Controlled Clinical Trials as Topic; D006331:Heart Diseases / Q000517:prevention & control; D006801:Humans; D008175:Lung Neoplasms / Q000209:etiology / Q000517:prevention & control*; D009369:Neoplasms / Q000517:prevention & control*; D012907:Smoking / Q000009:adverse effects*; D019207:beta Carotene
chemical_list: D016588:Anticarcinogenic Agents; D019207:beta Carotene; D001194:Asbestos; D002338:Carotenoids