Text and Data Mining valid from 2017-09-08
Received: 1 November 2016
Accepted: 21 August 2017
First Online: 8 September 2017
Compliance with Ethical Standards
: The authors did not receive any research grant from business or universities to support this project. Author A declares that he/she has no conflict of interest. Author B declares that he/she has no conflict of interest.
: This article does not contain any studies with human participants performed by any of the authors.