Templeton TW, Morris BN, Goenaga-Diaz EJ, Forest DJ, Hadley R, Moore BA, Bryan YF, Royster RL. A Prospective Comparison of Intraluminal and Extraluminal Placement of the 9-French Arndt Bronchial Blocker in Adult Thoracic Surgery Patients. J Cardiothorac Vasc Anesth. 2017 Aug; 31(4):1335-1340.