Øvrebø, B.
Kjøllesdal, M.
Stea, T. H.
Wills, A. K.
Bere, E.
Magnus, P.
Juliusson, P. B.
Bergh, I. H.
Funding for this research was provided by:
Norwegian Research Council (260408/H10, 260408/H10, 260408/H10, 260408/H10, 260408/H10, 260408/H10)
Norwegian Institute of Public Health
Article History
Received: 17 February 2023
Accepted: 21 August 2023
First Online: 29 August 2023
Declarations
:
: The studies were conducted in accordance with the Helsinki Declaration. Ethical approval and research clearance were obtained from the Regional Committee for Medical Research Ethics (2010/938) and approved by the Norwegian Data Inspectorate. Detailed information about the NCGS was sent to parents or guardians, and the School Health Service obtained written informed consent from parents or other legal guardians on behalf of the Norwegian Institute of Public Health prior to each survey.
: Not applicable.
: The authors declare no competing interests.