Nystøyl, Dag Ståle http://orcid.org/0000-0002-7503-9394
Østerås, Øyvind
Hunskaar, Steinar
Zakariassen, Erik
Funding for this research was provided by:
Stiftelsen Norsk Luftambulanse
University of Bergen
Article History
Received: 18 July 2021
Accepted: 25 May 2022
First Online: 8 June 2022
Declarations
:
: The study was approved by the Regional Committee for Medical and Health Research Ethics (2017/283/REC West, Norway). Prior to analyses, the patient identification variables were deleted by the main author (DSN). REC West approved an exception of informed consent from the participants due to no identifying data in the analysis.
: Not applicable.
: The authors declare that they have no competing interests.