R. G. Avanesyan
St. Petersburg State Pediatric Medical University; Saint Petersburg City Mariinsky Hospital
Russian Federation

Avanesyan Ruben G., Dr. of Sci. (Med.), Head of the Department of General Surgery with the Course of Endoscopy

2, Litovskaya str., Saint Petersburg, 194100; 56; Liteiny pr., Saint Petersburg,,191014

M. P. Korolev
St. Petersburg State Pediatric Medical University
Russian Federation

Korolev Mikhail P., Dr. of Sci. (Med.), Professor of the Department of General Surgery with the Course of Endoscopy

2, Litovskaya str., Saint Petersburg, Russia, 194100

L. Z. Hafizov
St. Petersburg State Pediatric Medical University
Russian Federation

Hafizov Lutfullo Z., Postgraduate Student of the Department of General Surgery with the Course of Endoscopy

2, Litovskaya str., Saint Petersburg, 194100

R. A. Movsesian
St. Petersburg State Pediatric Medical University$ Saint Petersburg City Mariinsky Hospital
Russian Federation

Movsesian Ripsime А., Assistant of the Department of General Surgery with the Course of Endoscopy

2, Litovskaya str., Saint Petersburg, 19410056;

Liteiny pr., Saint Petersburg, 191014

A. V. Klimov
St. Petersburg State Pediatric Medical University
Russian Federation

Klimov Alexey V., Assistant of the Department of General Surgery with the Course of Endoscopy

2, Litovskaya str., Saint Petersburg, 194100

G. R. Avanesyan
St. Petersburg State Pediatric Medical University
Russian Federation

Avanesyan Garry R., Clinical Resident for 2 years of the Department of General Surgery with the Course of Endoscopy

2, Litovskaya str., Saint Petersburg,194100