Pushkareva, V. I.
Article History
Received: 21 February 2019
Revised: 11 March 2019
Accepted: 11 March 2019
First Online: 10 April 2020
COMPLIANCE WITH ETHICAL STANDARDS
: <i>Conflict of interests</i>. The authors declare that they have no conflicts of interest.
: <i>Statement on the welfare of animals</i>. This article does not contain any studies involving animals performed by any of the authors.