1. Heart Institute, Cincinnati Children’s Hospital Medical Center, OH (M.G.).
2. Department of Pediatrics, University of Michigan Medical School, Ann Arbor, MI (M.K.O., G.E.O., J.R.C., S.K.P.).
3. Michigan Congenital Heart Outcomes Research and Discovery Unit, PC4 Data Coordinating Center, University of Michigan, Ann Arbor, MI (W.Z.).
4. Department of Anesthesia and Critical Care, Johns Hopkins University School of Medicine, Baltimore, MD (D.K.).
5. Department of Pediatrics, Medical University of South Carolina, Charleston, SC (J.M.C.).
6. Department of Paediatrics, Temerty Faculty of Medicine, The University of Toronto, ON (S.M.S.).
7. Department of Biostatistics, University of Michigan School of Public Health, Ann Arbor, MI (M.B.).