1. Pediatric Intensive Care Unit, Department of Pediatrics, Sainte-Justine Hospital, Université de Montréal, Montreal, Quebec
2. Department of Medicine, The Queen Elizabeth II Health Center, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia
3. Pediatric Intensive Care Unit, The Hospital For Sick Children, and Department of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada