Melkina, O. E.
Zavilgelsky, G. B.
Article History
Received: 3 September 2020
Revised: 3 September 2020
Accepted: 1 October 2020
First Online: 16 December 2021
COMPLIANCE WITH ETHICAL STANDARDS
: The authors declare they have no conflict of interest. The study contains no research using humans or animals as objects of study.