title: [Etiological aspects of primary cancer of the liver. I. Incidence and general factors].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D006801:Humans; D008103:Liver Cirrhosis / Q000150:complications; D008113:Liver Neoplasms / Q000453:epidemiology / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D013030:Spain
vernacular_title: Aspectos etiológicos del cáncer primitivo de hígado. I. Frecuencia y factores generales