1 Department of Pediatrics, Université de Sherbrooke, and Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Québec, Canada.
2 Division of Cardiology, St Paul's Hospital, University of British Columbia, Vancouver, British Columbia, Canada.
3 Division of Cardiology, Montreal Children's Hospital, McGill University Health Center, Montreal, Québec, Canada.
4 University Health Network, Peter Munk Cardiac Centre, Toronto Adult Congenital Heart Disease Program, University of Toronto, Toronto, Ontario, Canada.