Funding for this research was provided by:
National Science Center (DEC-2017/01/X/NZ4/00331)
Text and Data Mining valid from 2019-11-08
Received: 2 December 2018
Accepted: 22 September 2019
First Online: 8 November 2019
Compliance with ethical standards
: The authors declare that they have no conflicts of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.