Freund, Eric
Liedtke, Kim Rouven http://orcid.org/0000-0002-0273-509X
van der Linde, Julia http://orcid.org/0000-0003-4286-861X
Metelmann, Hans-Robert
Heidecke, Claus-Dieter
Partecke, Lars-Ivo
Bekeschus, Sander http://orcid.org/0000-0002-8773-8862
Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (03Z22DN11)
Article History
Received: 7 February 2018
Accepted: 5 December 2018
First Online: 24 January 2019
Competing Interests
: The authors declare no competing interests.