M.L. SHTEINER1,2, A.V. ZHESTKOV2, N.E. LAVRENTYEVA2, A.D. PROTASOV2 1Samara State Hospital №4, 125 Michurin Str., Samara, Russian Federation, 443056 2Samara State Medical University, 89 Chapaevskaya Str., Samara, Russian Federation, 443099 Shteiner M.L. ¾ D. Med. Sc., endoscopist, Assistant of the Department of Surgery with the course of endoscopy, tel. +7-927-207-71-18, e-mail: [email protected] Zhestkov A.V. ¾ […]