Frings, Christian
Domes, Gregor
Friehs, Maximilian A.
Geißler, Christoph
Schneider, Kerstin
Article History
Received: 8 March 2019
Accepted: 15 July 2019
First Online: 14 August 2019
Compliance with Ethical Standards
: The experimental protocol was approved by the ethics committee of the University of Trier and was conducted in accordance with the latest revision of the Declaration of Helsinki.
: The authors declare that they have no conflict of interest.