title: The optimal approach to identifying the cause of lower respiratory tract infection. A resolvable controversy.
mesh_terms: D001999:Bronchoscopy; D005336:Fiber Optic Technology / Q000295:instrumentation; D006801:Humans; D008168:Lung / Q000378:metabolism*; D012141:Respiratory Tract Infections / Q000175:diagnosis / Q000209:etiology*; D013183:Sputum / Q000382:microbiology; D013396:Suction