D. V. Savin
Orenburg State Medical University of the Ministry of Health of the Russian Federation; N.I. Pirogov City Clinical Hospital
Russian Federation

Savin Dmitry Vladimirovich – Candidate of Medical Sciences, Associate Professor of the Department of Faculty Surgery;  Deputy Chief Physician for Surgery 

460000, Orenburg, Sovetskaya street, 6

140 V Pobedy Ave., Orenburg, 460048

I. N. Borodkin
Orenburg State Medical University of the Ministry of Health of the Russian Federation; N.I. Pirogov City Clinical Hospital
Russian Federation

Borodkin Ivan Nikolaevich – Candidate of Medical Sciences, Assistant of the Department of Faculty Surgery; Head of the Endoscopy Department 

460000, Orenburg, Sovetskaya street, 6

140 V Pobedy Ave., Orenburg, 460048

E. A. Sinelshchikov
N.I. Pirogov City Clinical Hospital
Russian Federation

Sinelshchikov Evgeny Andreevich – Candidate of Medical Sciences, surgeon

140 V Pobedy Ave., Orenburg, 460048

V. V. Kan
N.I. Pirogov City Clinical Hospital
Russian Federation

Kan Valentin Vyacheslavovich – a surgeon

140 V Pobedy Ave., Orenburg, 460048