It's time to pick the low-hanging fruit.
Petty
T L
TL
D000402:Airway Obstruction / Q000150:complications / Q000175:diagnosis; D001999:Bronchoscopy; D006801:Humans; D008175:Lung Neoplasms / Q000175:diagnosis* / Q000209:etiology* / Q000628:therapy; D013902:Radiography, Thoracic; D012907:Smoking / Q000009:adverse effects*; D014057:Tomography, X-Ray Computed