title: The difficult tracheal intubation.
mesh_terms: D000402:Airway Obstruction / Q000209:etiology; D000758:Anesthesia; D004064:Digestive System / Q000293:injuries; D006801:Humans; D007442:Intubation, Intratracheal / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods; D008487:Medical History Taking; D010808:Physical Examination