Affiliation: | 1. Division of Cardiology, Department of Medicine, University of California at Los Angeles Medical Center, , Los Angeles, California;2. Division of Cardiothoracic Surgery, Department of Surgery, University of California at Los Angeles Medical Center, , Los Angeles, California;3. Division of Cardiothoracic Anesthesiology, Department of Anesthesiology, University of California at Los Angeles Medical Center, , Los Angeles, California |