1. Division of Pediatric Cardiology, Department of Pediatrics (D.B.G.), Stanford University School of Medicine, Palo Alto, CA.
2. Division of Pediatric Cardiac Anesthesia, Department of Anesthesiology (D.S.C.), Stanford University School of Medicine, Palo Alto, CA.
3. Stanford Center for Biomedical Ethics, Palo Alto, CA (D.S.C.).