Received: 8 April 2021
Accepted: 16 August 2021
First Online: 31 August 2021
: All HUNT participants were informed about the study and gave their informed consent to participate. The consistent included the use of the data material in the future and it was approved by the Regional Committees for Medical Research and Health Research Ethics. This study was approved by the Regional Committees for Medical Research and Health Research Ethics in Norway (reference2019/30292/REK Nord) and the Norwegian Centre for Research Data (reference 30292/NSD). All study methods were carried out following the institutional guidelines and according to the ethical standards in human research.
: Not applicable.
: The authors declare that they have no competing interests in the manuscript.