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Authors
Belskaya, K. A.
Lytaev, S. A.
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Article History
Received: 4 January 2021
Revised: 1 March 2021
Accepted: 30 April 2021
First Online: 5 March 2022
COMPLIANCE WITH ETHICAL STANDARDS
: All studies were conducted in accordance with the principles of biomedical ethics formulated in the 1964 Declaration of Helsinki and its subsequent updates, and approved by the Ethics Committee St. Petersburg State Pediatric Medical University (St. Petersburg).
: The authors declare no obvious and potential conflicts of interest related to the publication of this article.
: Each study participant provided a voluntary written informed consent, signed by him after explaining to him the potential risks and benefits, as well as the nature of the upcoming study.
