Funding for this research was provided by:
UiT The Arctic University of Norway
Received: 25 March 2022
Accepted: 6 September 2022
First Online: 15 September 2022
: The seventh survey of the Tromsø Study was approved by The Regional Committee of Medical and Health Research Ethics (REC) North (reference 2014/940) and the Norwegian Data Protection Authority (reference 14/01463-4/CGN). All procedures performed were in accordance with the 1964 Declaration of Helsinki and its later amendments. All participants gave written informed consent. This study was approved by REK Nord (reference 2019/1137) and the Norwegian Data Protection Authority.
: Not applicable.
: The authors declare that they have no competing interests.