V. K. Koryttsev
Samara State Medical University
Russian Federation

Vladimir K. Korytsev, MD, Professor, Professor of the Department of Faculty Surgery 
Author's contribution: author of the idea, writing the working version of the manuscript, responsibility for the integrity of all parts of the article.

Chapaevskaya St., 89, Samara, 443099

S. S. Skupchenko
Samara State Medical University; Samara City Clinical Hospital No. 1 named after N.I. Pirogov
Russian Federation

Sergey Sergeevich Skupchenko, Head of the Endoscopy Department; External Applicant, Department of Faculty Surgery 
Author's contribution: collection and processing of material, literature analysis, preparation of illustrations.

Chapaevskaya St., 89, Samara, 443099;
Polevaya St., 80, Samara, 443096

A. M. Krasnoslobodtsev
Samara State Medical University; Samara City Clinical Hospital No. 1 named after N.I. Pirogov
Russian Federation

Andrey Mikhailovich Krasnoslobodtsev, Surgeon, Department of Surgery, Assistant Professor, Department of Faculty Surgery 
Author's contributions: collection and processing of material, editing the text of the article.

Chapaevskaya St., 89, Samara, 443099;
Polevaya St., 80, Samara, 443096