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Affiliations

• ¹ Division of Cardiology, Department of Pediatrics, Children's National Hospital, The George Washington University School of Medicine, Washington, DC.
• ² Division of Cardiology, Department of Pediatrics, CHU Ste-Justine, University of Montreal, Montreal, Quebec, Canada.
• ³ Department of Cardiology, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, Massachusetts.
• ⁴ Division of Cardiology, Department of Pediatrics, Seattle Children's Hospital, University of Washington, Seattle, Washington.
• ⁵ Department of Congenital Heart Disease, Bristol Heart Institute, University of Bristol, Bristol, UK.
• ⁶ Division of Cardiology, Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Ontario, Canada.
• ⁷ Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy.
• ⁸ Department of Pediatrics, Rady Children's Hospital, University of California San Diego, San Diego, California.