Belyakov, A. M.
Article History
Received: 24 December 2019
Revised: 30 August 2020
Accepted: 1 September 2020
First Online: 2 April 2021
COMPLIANCE WITH ETHICAL STANDARDS
: <i>Conflict of interests</i>. The authors declare that they have no conflicts of interest.
: <i>Statement on the welfare of humans or animals</i>. This article does not contain any studies involving animals performed by any of the authors.