* Professor, Department of Anesthesiology and Critical Care Medicine, Memorial Sloan-Kettering Cancer Center, and Associate Professor of Clinical Anesthesiology, Department of Anesthesiology, Weill Cornell Medical College, New York, New York. # Assistant Professor, Department of Anesthesiology and Critical Care Medicine, Memorial Sloan-Kettering Cancer Center, and Department of Anesthesiology, Weill Cornell Medical College, New York, New York. † Assistant Attending Psychologist, Department of Anesthesiology and Critical Care Medicine, Memorial Sloan-Kettering Cancer Center, New York, New York. ‡ Assistant Attending Behavioral Scientist, Department of Psychiatry and Behavorial Sciences, § Programmer Analyst, Department of Anesthesiology and Critical Care Medicine, Memorial Sloan-Kettering Cancer Center, New York, New York. ∥ Professor, Department of Psychology, Queens College of the City University of New York, Flushing, New York.