Efimova, S. S.
Ostroumova, O. S.
Article History
Received: 20 January 2020
Revised: 26 January 2020
Accepted: 26 January 2020
First Online: 24 September 2020
COMPLIANCE WITH ETHICAL STANDARDS
: The authors declare that they have no conflict of interest.
: The authors did not conduct experiments with animals or human beings.