M. V. Vusik
Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Sciences
Russian Federation

Marina V. Vusik, MD, DSc, Senior Researcher, Endoscopy Department, 

5, Kooperativny St., Tomsk, 634009

V. I. Shtin
Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Sciences
Russian Federation

Valentin I. Shtin, MD, PhD, Senior Researcher, Department of Head and Neck Tumors,

5, Kooperativny St., Tomsk, 634009

O. V. Cheremisina
Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Sciences
Russian Federation

Olga V. Cheremisina, MD, DSc, Head of Endoscopy Department,

5, Kooperativny St., Tomsk, 634009

K. Yu. Menshikov
Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Sciences
Russian Federation

Kirill Yu. Menshikov, MD, PhD, Endoscopy Department, 

5, Kooperativny St., Tomsk, 634009

V. A. Novikov
Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Sciences
Russian Federation

Valery A. Novikov, MD, DSc, Chief Researcher, Department of Head and Neck Tumors, 

5, Kooperativny St., Tomsk, 634009