Funding for this research was provided by:
Norges Forskningsråd (260659)
Article History
Received: 16 September 2019
Accepted: 8 May 2020
First Online: 19 May 2020
Ethics approval and consent to participate
: The study was approved by the Regional Ethics Committee for Western Norway, which falls under the Norwegian Ministry of education and research (REK-vest no. 2015/885). All participants have signed an informed consent scheme.
: Not applicable.
: The authors declare that they have no competing interests.