Author contribution: Gornov SV — contribution to research design, concept development, research procedure; Karpenko DV — manuscript writing; Gornov VV — data analysis and interpretation, critical revision of the manuscript draft; Kolomiitsev VG — manuscript writing, data acquisition, software development; Eselevich RV — final conclusions; Burova IV — study concept determination, manuscript draft writing, approval of the final version of the article, responsibility for integrity of all parts of the article; Litvinenko EA — methodology development; Krupa RA — manuscript formatting.

Compliance with the ethical standards: the study was compliant with the principles of the Declaration of Helsinki.