Funding for this research was provided by:
Norges Forskningsråd (256574)
Received: 30 June 2020
Accepted: 15 March 2021
First Online: 25 March 2021
: The study was approved by the Institutional Review Board at Oslo University Hospital (approval number: 2017/6697). Study approval was requested but waived by the Regional Committee for Medical and Health Research Ethics for South East Norway. Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.