Funding for this research was provided by:
Uniwersytet Jagielloński w Krakowie
Text and Data Mining valid from 2019-02-01
Received: 24 September 2018
Accepted: 6 January 2019
First Online: 14 February 2019
Compliance with ethical standards
: This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. This article does not contain any studies with human participants or animals performed by any of the authors.
: The authors declare that they have no conflict of interest.