title: Epidemiology of malignant tumors in occupational groups: methods and peculiarities of study.
mesh_terms: D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008297:Male; D009369:Neoplasms / Q000453:epidemiology / Q000209:etiology*; D009784:Occupational Diseases / Q000453:epidemiology / Q000209:etiology*; D012107:Research Design