作者单位:Service of Otolaryngology, Head and Neck Surgery, Department of Surgery and Anesthesiology[1]Service of Respiratory Medicine, Department of Medicine, Lausanne University Hospital, Lausanne[2]Service of Thoracic Surgery, Department of Surgery and Anesthesiology, Lausanne University Hospital[3]Service of Anesthesiology, Department of Surgery and Anesthesiology, Lausanne University Hospital[4]