Cherkashin, S. A.
Article History
Received: 2 April 2019
Revised: 18 June 2019
Accepted: 3 October 2019
First Online: 27 July 2020
COMPLIANCE WITH ETHICAL STANDARDS
: <i>Conflict of interests.</i> The author declares that he has no conflict of interest.
: <i>Statement on the welfare of animals.</i> All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.