Article History
Received: 29 March 2021
Accepted: 26 August 2021
First Online: 16 September 2021
Declarations
:
: Institutional ethics approval was provided by the South western Ambulance Service NHS foundation Trust (ref 17-018) and the University of Plymouth (reference 1718424). Retrospective consent was not required as patient data was fully anonymised. Participant written consent for SCAs was gained.
: All data is fully anonymised. Written consent of was gained for each participant, including for publication.
: The authors declare no competing interests.