Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (288917560)
Received: 29 May 2019
Accepted: 20 May 2020
First Online: 3 June 2020
Ethics approval and consent to participate
: The study was approved by the ethics committee of Ulm University (Nr. 202/15). Participants received detailed information and provided written informed consent.
: Not applicable.
: The authors declare that there is no conflict of interest.