Nystøyl, Dag Ståle http://orcid.org/0000-0002-7503-9394
Røislien, Jo
Østerås, Øyvind
Hunskaar, Steinar
Breidablik, Hans Johan
Zakariassen, Erik
Funding for this research was provided by:
Stiftelsen Norsk Luftambulanse
Article History
Received: 2 July 2020
Accepted: 9 October 2020
First Online: 2 November 2020
Ethics approval and consent to participate
: The study was approved by the Regional Committee for Medical and Health Research Ethics (2017/280/REC West, Norway). In addition, the regional health authorities approved the use of patient- and administrative data. Patient identification variables were deleted by the main author (DSN) before analysis in accordance with the approval from REC West.Consent for publication.Not applicable.
: The authors declare that they have no competing interests.