A. V. Shcherbatykh
Irkutsk State Medical University
Russian Federation

Andrey V. Shcherbatykh – Dr. Sc. (Med.), Professor, Rector.

Krasnogo Vosstaniya Str., 2, Irkutsk 664003

A. V. Belonogov
Irkutsk State Medical University; Regional Oncology Dispensary
Russian Federation

Aleksandr V. Belonogov – Dr. Sc. (Med.), Professor, Professor of the Department of Oncology and Radiation Therapy, Irkutsk SMU; endoscopist of the endoscopic department of the Regional Oncology Dispensary.

Krasnogo Vosstaniya Str., 2, Irkutsk 664003; Frunze Str., 32, Irkutsk 664032

K. V. Tolmachev
Irkutsk State Medical University; Regional Oncology Dispensary
Russian Federation

Konstantin V. Tolmachev – oncologist of the Department of surgical methods of treatment of tumors of the head and neck, Regional Oncology Dispensary; Assistant of the Department of Oncology and Radiation Therapy, Irkutsk SMU.

Krasnogo Vosstaniya Str., 2, Irkutsk 664003; Frunze Str., 32, Irkutsk 664032