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

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

1, Ostrovityanov St., Moscow, 117997, Russia

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

O. A. Alukhanyan
Kuban State Medical University
Russian Federation

Ovik A. Alukhanyan, Dr. Sci. (Med.), Professor of the Department of Cardiac Surgery and Cardiology, Faculty of Vocational Education and Professional Retraining of Specialists

4, Mitrofan Sedin St., Krasnodar, 350063, Russia 

V. N. Lobanov
First Phlebological Center
Russian Federation

Victor N. Lobanov, Surgeon, Vascular Surgeon, General Director

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

A. R. Larina
First Phlebological Center
Russian Federation

Alina R. Larina, Ultrasound Diagnostics Doctor

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