Kelly A Machovec1, Brad Taicher, Robert D B Jaquiss, Kevin D Hill. 1. From the Division of Pediatric Anesthesiology, Department of Anesthesiology (K.A.M.), Division of Pediatric Anesthesiology, Department of Anesthesiology, School of Medicine (B.T.), Division of Cardiovascular and Thoracic Surgery, Department of Surgery (R.D.B.J.), and Division of Pediatric Cardiology, Department of Pediatrics, School of Medicine (K.D.H.), Duke University Medical Center, Durham, North Carolina.