Text and Data Mining valid from 2018-10-30
Received: 11 August 2018
Accepted: 25 October 2018
First Online: 30 October 2018
Compliance with ethical standards
: We clearly state that human participants have the approval of an appropriate named ethics committee including Helsinki declaration.
: We declare no financial support or relationship that may pose conflict of interest. The authors confirm that this manuscript has not been published or presented elsewhere, in part or in entirety, and is not under consideration by any other journal. All authors have made substantial contributions to this work and have read and approved the final submitted version.