M.L. SHTEINER1, 2, A.V. ZHESTKOV1, S.A. BABANOV1, YU.I. BIKTAGIROV1, A.D. PROTASOV1, V.V. KULAGINA3, M.O. ZOLOTOV1, I.I. SIROTKO1  1Samara State Medical University, Samara 2Samara City Hospital No. 4, Samara 3Samara Medical University REAVIZ, Samara  Contact details: Shteyner M.L. — MD, Associate Professor of the Department of Surgery with the course of endoscopy, physician-endoscopist Address: 89 Chapaevskaya St., Samara, Russian Federation, 443099, tel.: […]