Funding for this research was provided by:
Javna Agencija za Raziskovalno Dejavnost RS (P2-0270)
Text and Data Mining valid from 2018-10-10
Received: 13 December 2017
Accepted: 28 September 2018
First Online: 10 October 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.