Funding for this research was provided by:
Norges Forskningsråd (239948)
Received: 18 March 2020
Accepted: 4 August 2020
First Online: 10 August 2020
Ethics approval and consent to participate
: This study was approved by the Regional Ethics Committee South-East and written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.