Siegmann, Eva-Maria
Bouna-Pyrrou, Polyxeni
Lenz, Bernd http://orcid.org/0000-0001-6086-0924
Kornhuber, Johannes http://orcid.org/0000-0002-8096-3987
Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (01GL1745C)
Staedtler Stiftung (WW/eh 29/17)
Article History
Received: 4 October 2018
Accepted: 27 March 2019
First Online: 27 April 2019
Compliance with ethical standards
:
: Some of the authors conducted the primary studies cited in the article. Apart from this, the authors declare no conflict of interest.
: Not applicable. This investigation analyzed data previously published; no additional human participants have been involved.