Text and Data Mining valid from 2018-10-27
Received: 16 June 2018
Accepted: 19 October 2018
First Online: 27 October 2018
Compliance with Ethical Standards
: The authors declare that there is no conflict of interest.
: We declare that this manuscript represents valid work and that neither this manuscript nor one with substantially similar content under the present authorship has been published or is being considered for publication elsewhere and the authorship of this article will not be contested by anyone whose name(s) is/are not listed here, and that the order of authorship as placed in the manuscript is final and accepted by the co-authors.There is no prepublished information/material.