Nikitin, V. M.
Abasov, N. V.
Bolgov, M. V.
Osipchuk, E. N.
Article History
Received: 19 March 2020
Revised: 21 September 2020
Accepted: 25 December 2020
First Online: 10 September 2021
COMPLIANCE WITH ETHICAL STANDARDS
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: The authors declare that they have no conflict of interest.