Funding for this research was provided by:
arnor bjornsson memorial fund
university of iceland research fund
Article History
Accepted: 27 January 2022
First Online: 8 February 2022
Compliance with Ethical Standards
:
: All procedures performed in this study were approved by the National Bioethics Committee and the Icelandic Data Protection Authority. Approval was also obtained from the municipal authorities from the school districts of participating schools.
: Informed consent/assent was obtained from all participants in this study.
: The authors declare that they have no conflict of interest to report.