Obtaining sputum for cytology.
D000336:Aerosols; D003371:Cough; D003581:Cytodiagnosis; D006801:Humans; D008175:Lung Neoplasms / Q000175:diagnosis; D008297:Male; D011897:Random Allocation; D013048:Specimen Handling; D013183:Sputum / Q000166:cytology*
D000336:Aerosols