Affiliation: | 1. Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, Md;2. Department of Anesthesia, Stanford University School of Medicine, Stanford, Calif;3. Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, Calif;4. Department of Anesthesia, Cedars-Sinai Medical Center, Los Angeles, Calif |