Klimovich, P. S.
Semina, E. V.
Article History
Received: 14 December 2018
Revised: 12 March 2019
Accepted: 20 March 2019
First Online: 25 February 2020
COMPLIANCE WITH ETHICAL STANDARDS
: All procedures performed in this work comply with the ethical standards of the institutional committee for research ethics and the 1964 Helsinki Declaration and its subsequent changes or comparable ethical standards.
: <i>Confict of interest</i>. The authors declare they have no conflict of interest.