Funding for this research was provided by:
FP7 Ideas: European Research Council (617253)
Received: 4 January 2020
Accepted: 21 May 2020
First Online: 15 June 2020
Ethics approval and consent to participate
: This project was conducted according to the guidelines described in the Declaration of Helsinki and all procedures were approved by the ethical committee of the European Research Council (617253) and the Faculty Social Sciences, Radboud University, Nijmegen in the Netherlands (ECSW2014–100614-222). Active written consent was obtained from the school directors, caretakers and the participants themselves.
: Not applicable.
: The authors declare no competing interests.