Funding for this research was provided by:
Universitetet i Oslo
University of Oslo
Article History
Received: 14 December 2020
Accepted: 8 June 2021
First Online: 25 June 2021
Declarations
:
: None.
: The project was considered a quality assurance project and approved by the Norwegian Data Protection Services (project number 56467).
: Oral consent from children and legal guardian.
: Oral consent from children and legal guardian.