Funding for this research was provided by:
Russian Science Foundation (18-19-00124)
Ministry of Education, Culture, Sports, Science and Technology (17H03122, hp140159)
Text and Data Mining valid from 2020-04-30
Received: 29 August 2018
Accepted: 3 April 2020
First Online: 30 April 2020
: The authors declare no competing interests.