Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (FZ 031A352A)
Text and Data Mining valid from 2020-02-11
Received: 6 September 2019
Accepted: 27 January 2020
First Online: 11 February 2020
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: No human or animal material was used. The research conducted complied with all institutional and national guidelines.