E. A. Toneev
Ulyanovsk State University
Russian Federation

Toneev Evgeniy Aleksandrovich – PhD, assistant, Department of Faculty Surgery, Faculty of Medicine named after T.Z. Biktimirova, Institute of Medicine, Ecology and Physical Culture

432000, Ulyanovsk, L. Tolstoy, 42 

E. A. Keshyan
The State Budgetary Institution "City Clinical Hospital №15 named after O.M. Filatova DZM" Moscow ; Russian National Research Medical University named after. N.I. Pirogov
Russian Federation

Keshyan Eric Ashotovich – candidate of medical sciences, doctor of the surgical department,  Assistant, Department of Hospital Surgery 1 

Moscow, Veshnyakovskaya str., 23, 111539 

117997, Russia, Moscow, st. Ostrovityanova, 1 

D. S. Kostyaev
The State Budgetary Institution "City Clinical Hospital №15 named after O.M. Filatova DZM" Moscow
Russian Federation

Kostyaev Dmitriy Sergeevich – doctor of the surgical department 

111539, Moscow, Veshnyakovskaya str., 23