Heuch, Ingrid
Heuch, Ivar
Hagen, Knut
Storheim, Kjersti
Zwart, John-Anker
Funding for this research was provided by:
This research received no specific grant from any funding agency in the public, commercial or not-for-profit sectors.
Article History
Received: 26 October 2022
Accepted: 23 January 2023
First Online: 31 January 2023
Declarations
:
: This project was approved by the Regional Committee for Medical and Health Research Ethics in Central Norway (approval number 2014/968/REK midt), and HUNT was also approved by the Norwegian Data Inspectorate. Each participant in the surveys signed a written informed consent regarding the collection and use of data for research purposes. The work was carried out in accordance with the Declaration of Helsinki and other relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.