1. Emergency Department Perth Children's Hospital Perth Western Australia Australia
2. Department of Microbiology, Pathwest Laboratory Medicine QEII Medical Centre Perth Western Australia Australia
3. Wesfarmers Centre of Vaccines and Infectious Diseases, Telethon Kids Institute and School of Medicine The University of Western Australia Perth Western Australia Australia
4. Division of Emergency Medicine, School of Medicine The University of Western Australia Perth Western Australia Australia
5. Division of Paediatrics, School of Medicine The University of Western Australia Perth Western Australia Australia