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Authors
Frolova, O. V.
Kleshnev, E. A.
Grigorev, A. S.
Filatova, Yu. O.
Lyakso, E. E.
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Article History
Received: 16 November 2022
Revised: 12 January 2023
Accepted: 31 January 2023
First Online: 23 June 2023
Ethics
: Ethical standards. All studies were carried out in accordance with the principles of biomedical ethics formulated in the Declaration of Helsinki of 1964 and its subsequent updates, and approved by the Ethics Committee of St. Petersburg State University (St. Petersburg).
: Informed consent . Parents of all children provided written informed consent, signed by them after explaining to them the potential risks and benefits and the nature of the upcoming study.
: The authors declare the absence of obvious and potential conflicts of interest related to the publication of this paper.
: Conceptualization: Е.Е. Lyakso, O.V. Frolova, Yu.О. Filatova. Study planning: Е.Е. Lyakso, О.V. Fro-lova, А.S. Grigorev. Methodology: Е.Е. Lyakso, О.V. Frolova, Yu.О. Filatova. Investigation, data analysis, paper writing: E.E. Lyakso, O.V. Frolova, E.A. Kleshnev, Yu.O. Filatova, A.S. Grigorev.
