Kolesnikov, N. A.
Kharkov, V. N.
Zarubin, A. A.
Stepanov, V. A.
Article History
Received: 22 January 2019
Revised: 19 March 2019
Accepted: 15 April 2019
First Online: 24 October 2019
COMPLIANCE WITH ETHICAL STANDARDS
: <i>Conflicts of interest.</i> The authors declare that they have no conflict of interest.
: <i>Statement on the welfare of animals.</i> All procedures carried out in a study involving people comply with the ethical standards of the institutional and/or national research ethics committee and the 1964 Helsinki Declaration and its subsequent changes or comparable standards of ethics. Informed voluntary consent was obtained from each of the participants in the study.