A bottleneck of sputum cytology in mass survey for lung cancer: an approach to detect early stage lung cancer by sputum cytology.
D001980:Bronchi / Q000473:pathology; D002467:Cell Nucleus; D006801:Humans; D006965:Hyperplasia; D007564:Japan; D008175:Lung Neoplasms / Q000453:epidemiology* / Q000473:pathology; D008403:Mass Screening; D008679:Metaplasia; D009685:Nuclear Envelope; D013183:Sputum / Q000166:cytology*; D013997:Time Factors