Funding for this research was provided by:
Ministry of Innovation, Science, Research and Technology of North Rhine-Westphalia (313/323-400-002 13)
Article History
Received: 22 June 2020
Revised: 14 August 2020
Accepted: 2 September 2020
First Online: 19 September 2020
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.
: Not applicable.
: Not applicable.