Alen’kina, S. A.
Nikitina, V. E.
Article History
Received: 28 June 2019
Revised: 10 October 2019
Accepted: 1 November 2019
First Online: 30 March 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.