title: Cytology of the respiratory tract in former smokers.
mesh_terms: D000328:Adult; D001980:Bronchi / Q000166:cytology* / Q000473:pathology; D004847:Epithelial Cells; D005260:Female; D006801:Humans; D008264:Macrophages / Q000166:cytology; D008297:Male; D008679:Metaplasia; D008875:Middle Aged; D009093:Mucus / Q000166:cytology; D012907:Smoking; D013183:Sputum / Q000166:cytology*; D013194:Staining and Labeling; D013997:Time Factors