A. V. Pikuza
Kazan State Medical University; Republican Clinical Hospital
Russian Federation

Aleksey V. Pikuza, Cand. Sci. (Med.), Doctor of the Highest Qualification Category, Associate Professor of the Department of Surgical Diseases, 49, Butlerov St., Kazan, 420012;

Surgeon, 138, Orenburgsky Tract, Kazan, 420064

A. M. Zakirov
City Clinical Hospital No. 7 named after M.N. Sadykov
Russian Federation

Azat M. Zakirov, Doctor of the Highest Qualification Category, Surgeon, Department of Surgery,

54, Marshal Chuikov St., Kazan, 420103

Sh. S. Khachetlov
Kazan State Medical University
Russian Federation

Shamil S. Khachetlov, Student of the Pediatric Faculty,

49, Butlerov St., Kazan, 420012

E. E. Terziyan
Kazan State Medical University
Russian Federation

Eduard E. Terziyan, Student of the Faculty of Medicine,

49, Butlerov St., Kazan, 420012