Kleppang, Annette Løvheim http://orcid.org/0000-0002-3844-4745
de Ridder, Karin
Haugland, Siri Håvås
Stea, Tonje Holte
Article History
Received: 6 June 2021
Accepted: 21 October 2021
First Online: 1 November 2021
Declarations
:
: The HUNT studies were approved by the Data Inspectorate of Norway and by the Regional Committee for Medical Research Ethics (reference 101672), and all information from the HUNT was treated according to the guidelines of the Data Inspectorate. Participation was based on informed consent from participants aged 16 years or older. In accordance with Norwegian law, the parents of those younger than 16 years consented on behalf of their child.
: Not applicable.
: The authors have no conflicts of interest to declare.