A.V. Tkachev1, O.L. Tkacheva2, N. Mansur3, A.A. Mikhailov4

1,3,4 Peoples Friendship University of Russia (Moscow, Russia)

1 Moscow State University of Technology and Management named after K.G. Razumovsky (First Cossack University) (Moscow, Russia)

2 State Budgetary Professional Educational Institution «Medical College 7» (Moscow, Russia)

1 sasha_sashaola@mail.ru, 2 tkacheva.olga2017@gmail.com, 3 mansur-n@rudn.ru, 4 mikhaylov-aa@rudn.ru