1Departments of Critical Care Medicine and Paediatrics, The Labatt Family Heart Centre, The Hospital for Sick Children, Toronto, ON, Canada.
2Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
3Department of Cardiology, Children’s Hospital, Boston, MA.
4Department of Pediatrics, Harvard Medical School (R.R.T., P.C.L.), Boston, MA.
5Section of Cardiothoracic Surgery, Indiana University School of Medicine, James Whitcomb Riley Hospital for Children, Indianapolis, IN.
The authors have disclosed that they do not have any potential conflicts of interest.
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