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Authors
Tverdal, Cathrine http://orcid.org/0000-0002-1094-3825
Aarhus, Mads
Andelic, Nada
Skaansar, Ola
Skogen, Karoline
Helseth, Eirik
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Article History
Received: 23 April 2020
Accepted: 19 June 2020
First Online: 1 September 2020
Ethics approval and consent to participate
: The study was classified as a quality control study and was approved by OUH data protection officer. Consent to participate was waived.
: Not applicable.
: The authors declare no conflict of interest.
