Köckerling, F.
Article History
Received: 21 April 2020
Accepted: 26 May 2020
First Online: 3 June 2020
Compliance with ethical standards
:
: F.K. has no conflict of interest to report.
: A comment does not need an ethical approval.
: This article does not contain any study with humans and animals.
: As no study with humans has been performed for this comment informed consent was not needed.