Funding for this research was provided by:
Swiss National Sciences Foundation (100019_156505 / 1.)
Text and Data Mining valid from 2019-12-01
Received: 17 July 2019
Accepted: 19 November 2019
First Online: 31 December 2019
Ethics approval and consent to participate
: The ethics committees of the University of Teacher Education of the State of Vaud (Switzerland) and the University of Nice Sophia-Antipolis (France) approved the protocol design and the study. Written informed consent was obtained from the participants prior to participation (or their parents in the case of minors). Participation was entirely voluntary and full confidentiality was guaranteed.
: Not applicable.
: The authors declare that they have no competing interests.