title: Epidemiological follow-up studies of the Portuguese Thorotrast series (up-dated results).
mesh_terms: D004812:Epidemiologic Methods; D005260:Female; D005500:Follow-Up Studies; D006402:Hematologic Diseases / Q000209:etiology; D006801:Humans; D007938:Leukemia / Q000209:etiology; D008297:Male; D009381:Neoplasms, Radiation-Induced / Q000209:etiology; D011174:Portugal; D011829:Radiation Dosage; D013911:Thorium Dioxide / Q000009:adverse effects* / Q000378:metabolism; D013997:Time Factors
chemical_list: D013911:Thorium Dioxide