Red’ko, V. G.
Article History
Received: 8 February 2019
Revised: 8 November 2019
Accepted: 18 December 2019
First Online: 17 February 2021
COMPLIANCE WITH ETHICAL STANDARDS
: Conflict of interests . The authors declare that they have no conflicts of interest.
: Statement on the welfare of humans or animals . This article does not contain any studies involving animals performed by any of the authors.