Hartmann, Karsten
Article History
First Online: 2 March 2020
Compliance with ethical guidelines
:
: K. Hartmann declares that he has no competing interests.
: For this article no studies with human participants or animals were performed by the author. All studies performed were in accordance with the ethical standards indicated in each case. Additional written informed consent was obtained from all individual participants or their legal representatives for whom identifying information is included in this article.