Received: 1 October 2019
Accepted: 17 December 2019
First Online: 18 January 2020
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: All procedures were approved by the Institutional Review Board of The Amsterdam School of Communication Research at the University of Amsterdam (IRB # 2016-CS-7046) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Active informed consent was obtained from the adolescents and the heads of the schools. Passive informed consent was obtained for the adolescents’ parents.