B. V. Sigua
I.I. Grekov Department of Faculty Surgery, I.I. Mechnikov North-Western State Medical University
Russian Federation

Badri V. Sigua, Doctor of Medical Sciences, Professor

41, Kirochnaya Str., St. Petersburg, 191015

P. A. Kotkov
I.I. Grekov Department of Faculty Surgery, I.I. Mechnikov North-Western State Medical University
Russian Federation

Pavel A. Kotkov, Candidate of Medical Sciences, Assistant

41, Kirochnaya Str., St. Petersburg, 191015

D. Kh. Kalandarova
I.I. Grekov Department of Faculty Surgery, I.I. Mechnikov North-Western State Medical University
Russian Federation

Diyora Kh. Kalandarova, Competitor of the I.I. Grekov Department of Faculty Surgery

41, Kirochnaya Str., St. Petersburg, 191015

V. P. Zemlyanoy
I.I. Grekov Department of Faculty Surgery, I.I. Mechnikov North-Western State Medical University
Russian Federation

Vyacheslav P. Zemlyanoy, Doctor of Medical Sciences, Professor, Head of the I.I. Grekov Department of Faculty Surgery

41, Kirochnaya Str., St. Petersburg, 191015