E.G. Geyko¹, I.V. Radysh², V.F. Fedorov³, V.I. Torshin⁴

1–4 Peoples' Friendship University of Russia named after Patrice Lumumba (Moscow, Russia)

3 RNIMU named after N.I. Pirogov Ministry of Health of Russia (Moscow, Russia)

¹ geiko85@mail.ru, ² iradysh@mail.ru, ³ sogdjoy@mail.ru, ⁴ vtorsin@mail.ru