Received: 18 May 2021
Accepted: 20 January 2022
First Online: 4 February 2022
: All the procedures were carried out in accordance with relevant guidelines and ethical standards of the institutional (University of Oslo) and national research committee. Regional Committee for Medical and Health Research, REC South-East, approved the project (Reference number: 2017/2208). All participants provided written informed consent.
: Not applicable.
: The author reports no conflicting interests.