Funding for this research was provided by:
Albert-Ludwigs-Universität Freiburg im Breisgau
First Online: 3 July 2020
Compliance with Ethical Standards
: Julia Schwarz, Georgios Skiadaresis, Martin Kohler, Jörg Kunz, Florian Schnabel, Valentina Vitali, and Jürgen Bauhus declare that they have no conflict of interest.
: This article does not contain any studies with human or animal subjects performed by any of the authors.