Medvedev, S. P.
Malankhanova, T. B.
Valetdinova, K. R.
Zakian, S. M.
Article History
Received: 19 May 2021
Revised: 20 May 2021
Accepted: 21 May 2021
First Online: 15 December 2021
COMPLIANCE WITH ETHICAL STANDARDS
: <i>Conflict of interest.</i> The authors declare that they have no conflicts of interest.