Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (031A123)
Deutsche Forschungsgemeinschaft (252186816, 386850916)
Article History
Received: 3 April 2018
Accepted: 8 April 2018
First Online: 27 April 2018
Compliance with ethical standards
:
: The authors received funding from the German Federal Ministry of Education and Research (BMBF—Bundesministerium für Bildung und Forschung; project number: 031A123) and German Research Foundation (Deutsche Forschungsgemeinschaft, grant numbers: 252186816 and 386850916).
: Lars-Erik Meyer declares that he has no conflict of interest. Jan von Langermann declares that he has no conflict of interest. Udo Kragl declares that he has no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.