Siegmann, Eva-Maria
Müller, Tobias
Dziadeck, Isabelle
Mühle, Christiane
Lenz, Bernd
Kornhuber, Johannes
Funding for this research was provided by:
Staedtler Stiftung
Bundesministerium für Bildung und Forschung (01GL1745C)
Deutsche Forschungsgemeinschaft (270949263/GRK2162/1)
Projekt DEAL
Article History
Received: 13 November 2019
Accepted: 2 September 2020
First Online: 9 November 2020
Competing interests
: The authors declare no competing interests.