Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (01KI1725B, 01KI1725F)
Text and Data Mining valid from 2019-12-01
Received: 18 September 2019
Accepted: 5 December 2019
First Online: 16 December 2019
Ethics approval and consent to participate
: Not applicable.
: The authors declare that they have no competing interests.