Bubyrev, A. I.
Tsarkova, A. S.
Kaskova, Z. M.
Article History
Received: 10 October 2018
Revised: 31 October 2018
Accepted: 31 October 2018
First Online: 5 June 2019
COMPLIANCE WITH ETHICAL STANDARDS
: The authors declare that they have no conflict of interest. This article does not contain any studies involving animals or human participants performed by any of the authors.