Funding for this research was provided by:
Russian Foundation for Basic Research (16-34-01100, 16-04-00779, 17-04-01280)
Russian Science Foundation (18-14-00244)
Russian President's Fellowship (SP-4059.2016.4)
Text and Data Mining valid from 2018-10-31
Received: 9 April 2018
Accepted: 15 October 2018
First Online: 31 October 2018
Ethics approval and consent to participate
: The study was approved by the local ethics committee and conducted in accordance with the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.
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