Funding for this research was provided by:
FP7 Ideas: European Research Council (617253)
Text and Data Mining valid from 2018-04-16
Received: 20 December 2017
Accepted: 21 March 2018
First Online: 16 April 2018
Ethics approval and consent to participate
: The research project is 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 parental consent is obtained for child participation next to written consent of the school’s principals and school children.
: Not applicable.
: The authors declare that they have no competing interests.
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