Rumiantseva, Olga http://orcid.org/0000-0003-4244-1931
Ivanova, Elena http://orcid.org/0000-0002-6976-1452
Komov, Viktor http://orcid.org/0000-0001-9124-7428
Article History
Received: 27 July 2021
Accepted: 12 October 2021
First Online: 25 October 2021
Declarations
:
: The authors have no relevant financial or non-financial interests to disclose. The authors declare no competing interests.
: Each participant provided written informed consent to be included in the study. For participants under the age of 18, parental permission was requested. This study was performed in accordance with the World Medical Association (WMA) Declaration of Helsinki: ethical principles for medical research involving human subjects (WMA CitationRef removed). The program of this study was discussed and approved by the Bioethics Commission of Cherepovets State University and the Territorial Department of Health of the Vologda Oblast (No. 2-1/55).