Funding for this research was provided by:
UiT The Arctic University of Norway. Grant reference number NA
North Norway Regional Health Authorities
Article History
Received: 12 May 2020
Revised: 13 October 2020
Accepted: 10 November 2020
First Online: 11 December 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The Tromsø Study is approved by the Regional Committee for Medical Research Ethics (REK) and this investigation is covered by this approval.
: All included subjects signed a written informed consent.