1. Trauma Service, The Royal Children's Hospital, Melbourne, Australia
2. Emergency Department, The Royal Children's Hospital, Melbourne, Australia
3. Children's Hospital Lucerne, Lucerne, Switzerland
4. Department of Epidemiology & Preventive Medicine, Monash University, Melbourne, Australia
5. Surgical Research Group, Murdoch Children's Research Institute, Melbourne, Victoria, Australia
6. Department of Paediatrics, University of Melbourne, Melbourne, Australia