Article History
Received: 28 November 2022
Accepted: 21 February 2023
First Online: 10 March 2023
Compliance with ethical standards
:
: The authors declare no competing interests.
: The study received approval from the Regional Ethics Committee, Stockholm. Approval reference number 2010/1557–31/5.
: Informed consent was obtained from all students included in the study and from their parents.