Andriiash, G. S.
Sekan, O. S.
Tigunova, O. O.
Blume, Ya. B.
Shulga, S. M.
Article History
Received: 20 August 2019
Revised: 25 October 2019
Accepted: 18 March 2020
First Online: 7 April 2020
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.