Detection of early and roentgenologically occult bronchogenic carcinoma: preliminary report of the Sabbatsberg hospital sputum cytologic screening study.
D000368:Aged; D002283:Carcinoma, Bronchogenic / Q000453:epidemiology*; D006801:Humans; D008175:Lung Neoplasms / Q000453:epidemiology*; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D012907:Smoking; D013183:Sputum / Q000166:cytology*; D013548:Sweden