Nagornova, Zh. V.
Shemyakina, N. V.
Soroko, S. I.
Article History
Received: 1 October 2019
Revised: 7 January 2020
Accepted: 3 February 2020
First Online: 7 July 2020
COMPLIANCE WITH ETHICAL STANDARDS
: <i>Conflict of interest.</i> The authors declare no apparent and potential conflicts of interest related to the publication of this article.
: <i>Statement of compliance with standards of research involving humans as subjects</i>. All studies were conducted in accordance with the principles of biomedical ethics formulated in the Helsinki Declaration of 1964 and its subsequent updates and were approved by the Ethics Committee of the Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences (St. Petersburg). Written informed consent for the participation of a child in the study was received from the parents of each participant in the study; the study was carried out with the voluntary desire of the child.