Salkov, V. N.
Khudoerkov, R. M.
Article History
Received: 7 June 2018
Revised: 15 June 2018
Accepted: 20 June 2018
First Online: 7 August 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.