[Problems in sputum sampling].
D001419:Bacteria / Q000302:isolation & purification; D004945:Esophagoscopy; D006801:Humans; D008722:Methods; D011677:Punctures; D012141:Respiratory Tract Infections / Q000382:microbiology* / Q000473:pathology; D013183:Sputum / Q000382:microbiology*; D014132:Trachea / Q000382:microbiology / Q000473:pathology