1. Division of Critical Care Medicine (J.J.L., P.A.C., J.E., L.S.S.), Texas Children’s Hospital, Baylor College of Medicine, Houston.
2. Division of Cardiology (J.J.L., A.G.C., J.F.P.), Texas Children’s Hospital, Baylor College of Medicine, Houston.
3. Department of Pediatrics, University of Michigan Medical School, Ann Arbor (M.G., K.S.).
4. PC4 Data Coordinating Center, Michigan Congenital Heart Outcomes Research and Discovery Unit, University of Michigan, Ann Arbor (L.B., W.Z.).
5. Department of Biostatistics, University of Michigan School of Public Health, Ann Arbor (M.B.).
6. Department of Pediatrics, Heart Institute, Cincinnati Children’s Hospital Medical Center, OH (J.A.A., A.L.).
7. UT Southwestern Department of Pediatrics, Division of Cardiology, UT Southwestern Medical Center, Dallas, TX (R.J.B.).
8. Division of Cardiology, Children’s Hospital of Philadelphia, University of Pennsylvania School of Medicine (J.W.R.).