Funding for this research was provided by:
Norges Forskningsråd (230827,273838, 228174, 214123,274767)
Western Norwegian Regional Health Authorities (912011,911892,911631, 912128)
Received: 22 October 2020
Accepted: 1 July 2021
First Online: 13 July 2021
: Approval was obtained from the Regional Committee for Medical and Health Research Ethics in Western Norway (approval number 2012/1077). All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.