Funding for this research was provided by:
Received: 6 April 2020
Accepted: 30 August 2020
First Online: 10 September 2020
Ethics approval and consent to participate
: The local institutional review board “ethics committee of the Justus-Liebig-University Giessen” approved the study beforehand, AZ 68/18.
: Not applicable.
: The authors declare that they have no competing interests.