Amirkhanov, R. N.
Stepanov, G. A.
Article History
Received: 24 June 2019
Revised: 12 July 2019
Accepted: 22 July 2019
First Online: 16 January 2020
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.