Text and Data Mining valid from 2020-01-01
First Online: 8 January 2020
Compliance with ethical guidelines
: M. Jurkov, H. Olze, F. Klauschen, E. Bertelmann, U. Schneider and P. Arens declare that they have no competing interests.
: For this article no studies with human participants or animals were performed by any of the authors. 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.
: The supplement containing this article is not sponsored by industry.