Shary, P. A.
Sharaya, L. S.
Sidyakina, L. V.
Saksonov, S. V.
Article History
Received: 6 March 2019
Revised: 20 May 2019
Accepted: 29 May 2019
First Online: 6 April 2020
COMPLIANCE WITH ETHICAL STANDARDS
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: The authors declare that they have no conflict of interest.