Hofmann, N. http://orcid.org/0000-0003-3593-5677
Article History
Received: 7 September 2017
Accepted: 7 May 2018
First Online: 12 May 2018
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 any of the authors.
: For this type of study, formal consent is not required.