Funding for this research was provided by:
Belarusian Republican Foundation for Fundamental Research (B17-006; B19-001)
Text and Data Mining valid from 2019-10-23
Received: 21 June 2019
Accepted: 27 August 2019
First Online: 23 October 2019
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.