Received: 27 January 2021
Accepted: 8 April 2021
First Online: 28 April 2021
: This study has received ethics approval from the Regional Committee for Medical and Health Research Ethics, North-Norway (approval numbers 2015/2200 and 2015/2202) and the institutional Data Protection Officer (ref. no.2017_187). All the included patients received information about the study and signed written informed consent.
: The authors declare that there is no conflict of interest.