Funding for this research was provided by:
Accepted: 7 May 2021
First Online: 16 July 2021
: L. Klimek, R. Buhl, T. Deitmer, S. Plontke, W. Wehrmann, H. Merk, J. Ring and S. Becker declare that they have no competing interests.
: For this article no studies with human participants or animals were performed by any of the authors. All studies performed were in accordance with the ethical standards indicated in each case.
: The supplement containing this article is not sponsored by industry.