Morozov-Leonov, S. Yu.
Article History
Received: 5 November 2020
Revised: 19 December 2020
Accepted: 18 May 2021
First Online: 3 June 2021
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. We used lifelong analysis of animals. The source of protein was a fragment of the thumb of the hind limb.