Funding for this research was provided by:
Fonds NutsOhra (101.243)
Article History
Received: 14 January 2021
Accepted: 3 June 2021
First Online: 12 September 2021
Declarations
:
: The authors declare that they have no conflict of interest.
: The need for ethical approval was waived by the Medical Ethics Committee of the Amsterdam UMC—location AMC, because the study was not subject to the Dutch Medical Research Involving Human Subjects Act (WMO).
: An opting-out procedure was used. Parents were informed about the study through letters, flyers, and announcements in the school newsletter. If parents did not want their child to participate, they could inform the researchers by e-mail or hand in an opt-out slip to their child’s teacher.
: Not applicable.