1. Division of Pediatric Emergency Medicine, Department of Pediatrics, Hospital for Sick Children and University of Toronto, Toronto, Ontario, Canada
2. Division of Pediatric Emergency Medicine, Department of Pediatrics, Boston Children’s Hospital, Harvard University, Boston, Massachusetts, USA
3. Division of Orthopedic Surgery, Hospital for Sick Children, Toronto, Ontario, Canada
4. Department of Surgery, University of Toronto, Toronto, Ontario, Canada
5. Department of Diagnostic Imaging, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
6. Division of Pediatric Emergency Medicine, Department of Pediatrics, Stollery Children’s Hospital and University of Alberta, Edmonton, Alberta, Canada
7. Division of Pediatric Emergency Medicine, Department of Pediatrics, CHU Sainte-Justine and Université de Montréal, Montreal, Quebec, Canada
8. Department of Medicine, University of Toronto, Toronto, Ontario, Canada