Funding for this research was provided by:
Norges Forskningsråd (237766)
Received: 25 August 2019
Accepted: 28 January 2020
First Online: 14 February 2020
Ethics approval and consent to participate
: The Helse Sør-Øst Research Ethics Committee (REC) judged this study as a quality assurance project and therefore outside the committee’s mandate (ref: 2016/512 A, 07.04.2016). Approval for this study was obtained by the Akershus University Hospital’s internal privacy ombudsman (ref: CitationRef removed–118, 07.07.2016), with respect to data confidentiality and protection.
: Not applicable.
: The authors declare that they have no competing interests.