Article History
Received: 10 January 2021
Accepted: 13 January 2021
First Online: 6 February 2021
Compliance with ethical standards
:
: V. N. Nikolenko, M. Yu Nikolayev, and M. Y. Sinelnikov declare that they have no conflict of interest.
: This study does not contain any studies with human or animal subjects performed by any of the authors.