de Graaf, Hanneke http://orcid.org/0000-0002-2350-0230
ter Schure, Judith http://orcid.org/0000-0002-2147-5510
van Liere, Geneviève A. F. S.
Funding for this research was provided by:
Rijksinstituut voor Volksgezondheid en Milieu (323846)
Article History
Received: 11 May 2020
Accepted: 11 June 2021
First Online: 13 July 2021
Declarations
:
: The authors declare that they have no conflict of interest.
: The MREC UMC Utrecht confirmed that the Medical Research Involving Human Subjects Act (WMO) does not apply to Sex under the age of 25, and therefore an official approval of this study by the MREC UMC Utrecht is not required under the WMO (reference number WAG/mb/16/013562).
: For in-school youth, school boards provided active informed consent for participation of their students. In-school students and their parents provided passive informed assent and consent, respectively, where they were able to refuse voluntary participation. Out-of-school youth (≥17 years) provided active informed consent.