Text and Data Mining valid from 2018-02-01
Received: 30 November 2016
Revised: 30 January 2017
Accepted: 27 February 2017
First Online: 1 February 2018
Compliance with ethical guidelines
: S. Oezdemir, M. Komp, P. Hahn and S. Ruetten declare that they have no competing interests.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: The supplement containing this article is not sponsored by the industry.