1 Department of Anesthesiology, University of Minnesota, Minneapolis, MN.
2 Division of Congenital Cardiac Anesthesiology, University of Alabama at Birmingham School of Medicine, Bruno Pediatric Heart Center, Children's of Alabama, Birmingham, AL.
3 Cardiovascular and Thoracic Division, Department of Anesthesiology and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.
4 Department of Anesthesiology, Cardiothoracic Section, Wake Forest University School of Medicine, Medical Center Boulevard, Winston Salem, NC. Electronic address: [email protected].