Aleksandrov, A. Yu.
Uplisova, K. O.
Ivanova, V. Yu.
Article History
Received: 20 February 2019
Revised: 24 July 2019
Accepted: 5 September 2019
First Online: 13 May 2020
COMPLIANCE WITH ETHICAL STANDARDS
: <i>Conflict of interests.</i> The authors declare that they have no real or potential conflict of interest.
: <i>Statement of compliance with standards of research involving humans as subjects.</i> All procedures were performed in accordance with the ethical standards of the 1964 Helsinki Declaration and its later amendments and were approved by the local Ethics Committee at St. Petersburg State University. All individual participants involved in the study voluntarily gave written informed consent for participation after being informed about potential risks and benefits and the study nature.