Aspiration pneumonia and the laryngeal mask airway.
D000758:Anesthesia; D002763:Cholecystectomy; D006801:Humans; D007440:Intubation; D007830:Larynx; D008397:Masks; D011015:Pneumonia, Aspiration / Q000209:etiology*; D011183:Postoperative Complications / Q000209:etiology*; D012121:Respiration, Artificial