Zaytseva, T. B.
Medvedeva, N. G.
Article History
Received: 20 July 2018
Revised: 22 November 2018
Accepted: 27 November 2018
First Online: 29 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.