S. P. Zotov
City Clinical Hospital No. 8
Russian Federation

Nikolay B. Shishmentsev, Surgeon, Coloproctologist, Department of Purulent Surgery and Coloproctology

28, Gorky St., Chelyabinsk, 454071, Russia

N. B. Shishmentsev
Road Clinical Hospital at the Chelyabinsk station JSC “Russian Railways”
Russian Federation

Nikolay B. Shishmentsev, Surgeon, Coloproctologist, Department of Purulent Surgery and Coloproctology

23, Dovator St., Chelyabinsk, 454091, Russia

V. V. Vladimirskiy
Chelyabinsk Regional Clinical Hospital
Russian Federation

Vladimir V. Vladimirskiy, Dr. of Sci. (Med.), Head of the Department of Vascular Surgery

70, Vorovsky St., Chelyabinsk, 454048, Russia

V. Yu. Bogachev
Pirogov Russian National Research Medical University; First Phlebological Center
Russian Federation

Vadim Yu. Bogachev, Dr. of Sci. (Med.), Professor, Department of Faculty Surgery No.2

1, Ostrovityanov St., Moscow, 117997, Russia

31, Dmitry Ulyanov St., Moscow, 117447, Russia