N.I. Sinitsyn1, V.A. Yolkin2, A.I. Toma3

1 Saratov branch of V.A. Kotel’nikov IRE of RAS (Saratov, Russia)
2 JSC NPP «NIKA-SVCH» (Saratov, Russia)
3 FGBU «United hospital with polyclinic», Administration of the President of Russian Federation (Moscow, Russia)
1 zet2004@mail.ru, 2 jva8989@mail.ru, 3 al_toma@mail.ru