Funding for this research was provided by:
Российский Фонд Фундаментальных Исследований (РФФИ) (17-06-00572)
Text and Data Mining valid from 2020-02-10
Received: 30 June 2019
Revised: 30 June 2019
Accepted: 7 January 2020
First Online: 10 February 2020
: The authors declare that they have no competing interests. Author’s names are aligned according to their contribution.