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Article History

Received: 16 March 2020

Revised: 20 April 2020

Accepted: 2 September 2020

First Online: 31 May 2021

COMPLIANCE WITH ETHICAL STANDARDS

: All studies were conducted with the observance of the medical ethics principles stipulated under the 1964 Helsinki Declaration and its subsequent revisions and adopted by the local bioethics commission of the Samara National Research University (Samara, Russia).

: All participants in this study gave their voluntary written informed consent signed after each participant was duly acquainted with potential risks and advantages, as well as about the nature of the forthcoming study.

: The authors declare the absence of apparent and potential conflicts of interests associated with the publication of this article.