1. Emergency Department, Critical Care ServicesRoyal Adelaide Hospital Adelaide South Australia Australia
2. Department of MedicineSchool of Clinical Sciences at Monash Health, Monash University Melbourne Victoria Australia
3. Emergency Department, Monash Medical Centre Melbourne Victoria Australia
4. Emergency and Trauma CentreThe Alfred Hospital Melbourne Victoria Australia
5. School of Public Health and Preventive MedicineMonash University Melbourne Victoria Australia
6. Neuroepidemiology Unit, School of Population and Global HealthThe University of Melbourne Melbourne Victoria Australia