1. Division Critical Care Medicine, Department of Anesthesiology and Critical Care Medicine
2. Division of Cardiology, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
3. Division of Behavioral Medicine and Clinical Psychology and Divisions of
4. Cardiology
5. Division of General Internal Medicine, Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania
6. Biostatistics and Epidemiology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio