Funding for this research was provided by:
Bundesministerium für Ernährung und Landwirtschaft (2819103915)
BMBF (FKZ 031A536, FKZ 031B0190)
Received: 13 May 2019
Accepted: 25 November 2019
First Online: 18 December 2019
Ethics approval and consent to participate
: No ethics approval was required for this study.
: The authors declare that they have no competing interests.