Slobodkin, A. I.
Slobodkina, G. B.
Article History
Received: 27 March 2019
Revised: 11 April 2019
Accepted: 29 April 2019
First Online: 30 September 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.