Urusevskaya, I. S.
Article History
Received: 18 January 2020
Revised: 20 January 2020
Accepted: 23 February 2020
First Online: 1 October 2020
COMPLIANCE WITH ETHICAL STANDARDS
: Conflict of interests . The authors declare that they have no conflicts of interest. Statement on the welfare of humans or animals. This article does not contain any studies involving animals performed by any of the authors.