[ON THE PROBLEM OF EPIDEMIOLOGICAL STUDIES ON CANCER].
D001699:Biometry; D016021:Epidemiologic Studies; D004813:Epidemiology; D006801:Humans; D009369:Neoplasms / Q000453:epidemiology* / Q000209:etiology*; D011044:Poland
EPIDEMIOLOGY; NEOPLASM ETIOLOGY; NEOPLASM STATISTICS; POLAND