1. From the Department of Pediatrics, Division of Cardiology (W.M., G.W.), the Division of Neurology (R.R.C.), the Department of Anesthesia and Critical Care Medicine (S.C.N., K.G., L.M.M., R.C., C.D.K.), the Department of Surgery, Division of Cardiothoracic Surgery (J.W.G., T.L.S.), and the Department of Radiology (R.A.Z.), The Children’s Hospital of Philadelphia and the University of Pennsylvania School of Medicine, Philadelphia, Penn., and the Department of Neuroradiology, University of Modena,...