1. Emergency Department, Royal Children’s Hospital, Parkville, Victoria, Australia
2. Clinical Sciences, Murdoch Children’s Research Institute, Parkville, Victoria, Australia
3. Department of Paediatrics, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Parkville, Victoria, Australia
4. Emergency Department, Women’s and Children’s Hospital, Adelaide, Australia
5. Emergency Department, Logan Hospital, Brisbane, Queensland, Australia
6. Emergency Department, The Children’s Hospital at Westmead, Sydney, Australia
7. Emergency Department, Monash Medical Centre, Clayton, Victoria, Australia
8. Department of Emergency Medicine, Gold Coast University Hospital, Southport, Australia
9. School of Medicine and Menzies Health Institute Queensland, Griffith University, Southport, Australia
10. Department of Otolaryngology, Royal Children’s Hospital, Parkville, Victoria, Australia
11. Clinical Epidemiology and Biostatistics Unit, Murdoch Children's Research Institute, Parkville, Victoria, Australia
12. Children’s Emergency Department, Starship Children’s Hospital, Auckland, New Zealand
13. Departments of Surgery and Paediatrics: Child and Youth Health, University of Auckland, Auckland, New Zealand
14. Department of Critical Care, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Parkville, Victoria, Australia