Funding for this research was provided by:
Bundesministerium für Bildung und Forschung
Article History
Received: 1 August 2020
Accepted: 1 December 2020
First Online: 22 January 2021
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.
: The publisher has the permission of the authors to publish the given article.