Funding for this research was provided by:
Emergency Medicine Foundation (Research Fellowship)
Anschutz Medical Campus, University of Colorado (Department of Emergency Medicine, Seed Award)
National Heart, Lung, and Blood Institute (1K12HL137862-01)
Received: 4 August 2019
Accepted: 27 November 2019
First Online: 5 December 2019
Ethics approval and consent to participate
: Institutional approval was obtained from Western Cape Government Emergency Medical Services. Ethics approval was obtained, prior to study participation, from University of Cape Town Human Research Ethics Committee (FWA00001637; IRB 00001938; reference 080/2017), and the Colorado Multiple Institutional Review Board (FWA00005070; IRB IORG0000433; protocol no. 17-0284).
: Not applicable
: The authors declare that they have no competing interests.