1 Department of Anesthesiology, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, Division of Surgery and Interventional Sciences, University College London, London, United Kingdom, Anesthesiology Division, Envision Physician Services, Plantation, FL, and Department of Anesthesiology and Perioperative Medicine, Banner Thunderbird Medical Center, Glendale, AZ; Department of Anesthesiology, University of Illinois at Chicago, Chicago, IL; Department of Anesthesiology, University of Arizona College of Medicine-Phoenix, Phoenix, Phoenix, AZ, Department of Anesthesiology and Perioperative Medicine, Banner University Medical Center Phoenix, Phoenix, AZ, and Anesthesiology Division, Envision Physician Services, Plantation, FL; Department of Critical Care Medicine, University of Massachusetts Medical School, Baystate Medical Center, Springfield, MA.