Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (BMBF 01EO1003 and 01EO1503, BMBF 01EO1003 and 01EO1503, BMBF 01EO1003 and 01EO1503)
Article History
Received: 8 August 2019
Accepted: 9 August 2019
First Online: 19 August 2019
Compliance with ethical standards
:
: None reported.
: This article does not contain data derived by any current studies with human participants performed by any of the authors.
: For this type of study, formal informed consent is not required.