Hecker, Christian
Article History
Received: 1 April 2019
Accepted: 7 January 2020
First Online: 23 January 2020
Compliance with Ethical Standards
:
: The author declares that he has no conflict of interest.
: This article does not contain any studies with human participants or animals performed by the author.
: The author did not request informed consent, as his study did not involve any participants whose individual rights could be infringed.