Funding for this research was provided by:
Norges Forskningsråd (215961)
Received: 23 December 2019
Accepted: 20 March 2020
First Online: 18 May 2020
Ethics approval and consent to participate
: This research received an ethics approval from the Norwegian Centre for Research Data (NDS). Prior to interviews, all interviewees were informed about the purposes of the research and how the results would be used and gave their consent to participate.
: Not applicable
: The authors declare that they have no competing interests.