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Authors
Rabadanova, A. I.
Taygibova, Z. A.
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Article History
Received: 25 April 2019
Revised: 12 February 2020
Accepted: 19 April 2020
First Online: 25 January 2021
COMPLIANCE WITH ETHICAL STANDARDS
: Conflict of interests . The authors declare no apparent or potential conflicts of interest related to the publication of this article.
: Statement of compliance with standards of research involving humans as subjects . All studies were conducted in accordance with the principles of biomedical ethics, formed in the Helsinki Declaration of 1964 and its subsequent updates and approved by the local bioethical committee of the Dagestan State University (Makhachkala). Each study participant submitted voluntary written informed consent, signed by him after explaining to him the potential risks and benefits, as well as the nature of the forthcoming study.
