1Department of Critical Care Medicine, Division of Pediatric Cardiac Critical Care Medicine, University of Pittsburgh, Children's Hospital Pittsburgh, Pittsburgh, PA.
2Division of Cardiac Critical Care Medicine, George Washington University, Children's National Hospital, Washington, DC.
3Etiometry, Inc, Boston, MA.
4Department of Anesthesiology and Critical Care Medicine, Division of Cardiac Critical Care Medicine, University of Pennsylvania Perelman School of Medicine, Children's Hospital of Philadelphia, Philadelphia, PA.
5Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA.
6Department of Anesthesiology, Critical Care, and Pediatrics, University of Pennsylvania Perelman School of Medicine, Children's Hospital of Philadelphia, Philadelphia, PA.
7Harvard Medical School, Boston Children's Hospital, Boston, MA.
8Department of Cardiology, Division of Cardiovascular Critical Care Medicine, Harvard Medical School, Boston Children's Hospital, Boston, MA.