Received: 1 July 2020
Accepted: 5 April 2021
First Online: 15 April 2021
: The survey was approved by the Norwegian Data Protection Authority. This study is a secondary analysis of previously collected data, and according to the Norwegian Health Research Act, additional ethical approval was not required. The Norwegian Counties Public Health Survey core research group granted administrative permission to the authors to access the data.
: Not Applicable.
: The authors declare that they have no competing interests.