Malysheva, I. E.
Topchieva, L. V.
Tikhonovich, E. L.
Article History
Received: 27 May 2020
Revised: 31 July 2020
Accepted: 25 August 2020
First Online: 24 May 2021
COMPLIANCE WITH ETHICAL STANDARDS
: <i>Conflict of interest.</i> The authors declare that they have no conflict of interest.
: <i>Statement of compliance with standards of research involving humans as subjects.</i> All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants involved in the study.