1. Division of Cardiology Children's Hospital of Philadelphia and Department of Pediatrics Perelman School of Medicine at The University of Pennsylvania Philadelphia PA
2. Center for Pediatric Clinical Effectiveness The Children's Hospital of Philadelphia Philadelphia PA
3. Leonard Davis Institute and Center for Cardiovascular Outcomes, Quality, and Evaluative Research University of Pennsylvania Philadelphia PA
4. Department of Biostatistics Center for Clinical Epidemiology and Biostatistics Perelman School of Medicine at The University of Pennsylvania Philadelphia PA
5. Division of Pulmonology and Critical Care Department of Medicine Perelman School of Medicine at The University of Pennsylvania Philadelphia PA
6. Division of General Internal Medicine Department of Medicine Perelman School of Medicine at The University of Pennsylvania Philadelphia PA
7. Corporal Michael J. Crescenz VA Medical Center Philadelphia PA