1. Department of Paediatrics, Faculty of Medicine, Dentistry and Health Sciences University of Melbourne Melbourne Victoria Australia
2. Murdoch Children's Research Institute Melbourne Victoria Australia
3. Department of Emergency Medicine University of California Davis Medical Center Sacramento California United States
4. Emergency Department Royal Children's Hospital Melbourne Victoria Australia
5. Center for Healthcare Policy and Research University of California at Davis Sacramento California United States
6. Division of Health Policy and Management, Department of Public Health Sciences University of California at Davis Davis California United States
7. Centre for Health Policy The University of Melbourne School of Population and Global Health Melbourne Victoria Australia