1 Paramedic Unit, School of Medicine, Flinders University, Adelaide, South Australia, Australia; SA Ambulance Service (SAAS), Adelaide, South Australia, Australia. Electronic address: cindy2.hein@health.sa.gov.au.
2 Paramedic Unit, School of Medicine, Flinders University, Adelaide, South Australia, Australia; SA Ambulance Service (SAAS), Adelaide, South Australia, Australia.
3 Paramedic Unit, School of Medicine, Flinders University, Adelaide, South Australia, Australia; Flinders Medical Centre, Adelaide, South Australia, Australia.
4 Paramedic Unit, School of Medicine, Flinders University, Adelaide, South Australia, Australia.