1. Department of Otolaryngology–Head and Neck Surgery, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
2. Division of Pediatric Emergency Medicine, Department of Pediatrics, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
3. Department of Critical Care Medicine, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
4. Department of Anesthesiology and Pain Medicine, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada