V. V. Sokolov
P. Hertsen Moscow Oncology Research Institute – Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation
Russian Federation

Viktor V. Sokolov, MD, professor, head of endoscopy Department 

For correspondence: Address: 3, 2nd Botkinskiy proezd, Moscow, 125284

D. V. Sokolov
P. Hertsen Moscow Oncology Research Institute – Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation
Russian Federation

Dmitriy V. Sokolov, MD, senior researcher of endoscopy Department

L. V. Telegina
P. Hertsen Moscow Oncology Research Institute – Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation
Russian Federation

Larisa V. Telegina, PhD, senior researcher of endoscopy Department

A. L. Nikolaev
P. Hertsen Moscow Oncology Research Institute – Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation
Russian Federation

Andrey L. Nikolaev, PhD, researcher of endoscopy Department

A. P. Kirukhin
P. Hertsen Moscow Oncology Research Institute – Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation
Russian Federation

Andrey P. Kirukhin, PhD, researcher of endoscopy Department

Yu. L. Kudryavtseva
P. Hertsen Moscow Oncology Research Institute – Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation
Russian Federation

Yulia L. Kudryavtseva, junior researcher of endoscopy Departmen