title: [Fourth follow-up study on 272 Thorotrast-administered cases -- 1977 report].
mesh_terms: D000328:Adult; D005500:Follow-Up Studies; D006801:Humans; D007564:Japan; D008113:Liver Neoplasms / Q000453:epidemiology; D008175:Lung Neoplasms / Q000453:epidemiology; D008297:Male; D008887:Military Medicine; D009381:Neoplasms, Radiation-Induced / Q000453:epidemiology*; D013911:Thorium Dioxide / Q000009:adverse effects*
chemical_list: D013911:Thorium Dioxide