Gürtler, Lutz G. http://orcid.org/0000-0003-3435-9030
Article History
Received: 29 August 2019
Accepted: 5 December 2019
First Online: 17 December 2019
Compliance with ethical standards
:
: The author declares that they have no conflict of interest.
: Not applicable since no original studies were done.
: The author takes all responsibilities for the content of this article.