Spangler, Douglas
Blomberg, Hans
Smekal, David
Article History
Received: 5 November 2020
Accepted: 13 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: This study was approved by the Swedish Ethical Review Authority (dnr 2020–03093).
: Not Applicable.
: The authors are employed by the regional ambulance service studied. The authors declare that they have no further competing interests.