1. Division of Pediatric Emergency Medicine, and
2. Departments of Emergency Medicine and Pediatrics, School of Medicine, University of California, Davis, Sacramento, California;
3. Division of Pediatric Emergency Medicine, University of Ottawa and Children’s Hospital of Eastern Ontario, Ottawa, Canada;
4. Emergency Department, Royal Children’s Hospital, Murdoch Children’s Research Institute, Parkville, Australia;
5. University of Melbourne, Melbourne, Australia;
6. Emergency Department, Starship Children’s Hospital and the University of Auckland, Auckland, New Zealand;
7. Sections of Pediatric Emergency Medicine and Gastroenterology, Alberta Children's Hospital, Departments of Pediatrics, Alberta Children’s Hospital Research Institute, Cumming School of Medicine, Calgary University, Calgary, Canada;
8. Department of Biostatistics, Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada;
9. Research Institute, The Hospital for Sick Children, University of Toronto, Toronto, Canada
10. Department of Pediatric Emergency Medicine, Hasbro Children’s Hospital and Departments of Emergency Medicine, Pediatrics, and Health Services, Policy, and Practice, Brown University, Providence, Rhode Island;
11. Department of Pediatrics, Hospital de Santa Maria and Laboratory of Clinical Pharmacology and Therapeutics, Faculty of Medicine, Instituto de Medicina Molecular, University of Lisbon, Lisbon, Portugal;
12. Division of Emergency Medicine, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio;
13. Department of Pediatric Emergency Medicine, Children’s Hospital of Minnesota, Minneapolis, Minnesota;
14. Emergency Department, Bristol Royal Hospital for Children and Faculty of Health and Applied Life Sciences, University of the West of England, Bristol, United Kingdom;
15. Sections of Pediatric Emergency Medicine, and Physiology and Pharmacology, Alberta Children’s Hospital and Alberta Children’s Hospital Research Institute, Cumming School of Medicine, Calgary University, Calgary, Canada;
16. Department of Pediatric Emergency Medicine, School of Medicine, Washington University in St Louis, St Louis, Missouri;
17. Department of Pediatric Emergency Medicine, Baylor College of Medicine and Texas Children’s Hospital, Houston, Texas; and
18. Pediatric Emergency Department, Cruces University Hospital, Barakaldo, Spain