V.A. Yolkin1, A.I. Toma2, V.V. Komarov3, V.P. Meschanov4

1, 4JSC NPP «NIKA-SVCH» (Saratov, Russia)
2 FGBU «United hospital with polyclinic», Administration of the President of Russian Federation (Moscow, Russia)
3 Yuri Gagarin State Technical University of Saratov (Saratov, Russia)
1jva8989@mail.ru, 2 al_toma@mail.ru, 3 vyacheslav.komarov@gmail.com, 4 nika373@bk.ru