1. NHMRC Centre of Research Excellence in Pre‐hospital Emergency Care Australia and New Zealand (PEC‐ANZ), Monash University Melbourne Victoria Australia
2. Department of Epidemiology and Preventive MedicineMonash University, Melbourne Victoria Australia
3. Department of ParamedicineMonash University Melbourne Victoria Australia
4. Centre for Research and Evaluation, Ambulance Victoria Melbourne Victoria Australia
5. The Alfred Hospital Melbourne Victoria Australia