Shevchenko, K. V.
Nagaev, I. Yu.
Andreeva, L. A.
Shevchenko, V. P.
Myasoedov, N. F.
Article History
Received: 31 January 2019
Revised: 16 February 2019
Accepted: 20 February 2019
First Online: 14 August 2019
COMPLIANCE WITH ETHICAL STANDARDS
: <i>Conflict of interests</i>. The authors declare that they have no conflict of interest.