1 Anesthesiology Department, Duke University Medical Center, Durham, North Carolina, miles.berger@duke.edu Department of Anesthesiology, Perioperative & Pain Medicine, Stanford University, Palo Alto, California Department of Anesthesiology, Perioperative & Pain Medicine, Brigham and Women's Hospital, Boston, Massachusetts Departments of Anesthesiology and Clinical and Health Psychology, University of Florida, Gainesville, Florida Department of Anaesthesia and Acute Pain Medicine, St Vincent's Hospital, Melbourne, Australia Department of Anesthesiology, Columbia University Medical Center, New York, New York Department of Anesthesiology and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.