Sputum of chronic cigarette smokers. Microscopic observations and incidence of bronchial and bronchiolar spirals, fibrils and casts.
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012907:Smoking; D013183:Sputum / Q000166:cytology*