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; Scientific Supervisor 

1, Ostrovityanov St., Moscow, 117997;
31, Dmitry Ulyanov St., Moscow, 117447

H. P. Manjikian
Eramishantsev Moscow State Hospital; Vishnevsky National Medical Research Center of Surgery
Russian Federation

Hovsep P. Manjikian, Cardio-Vascular Surgeon, Head of Vein Clinic; Applicant 

15, Lenskaya St., Moscow, 129327;
27, Bolshaya Serpukhovskaya St., Moscow, 117997

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