M.L. SHTEINER1,2, A.V. ZHESTKOV2 1Samara Municipal Hospital №4, 125 Michurin Str., Samara, Russian Federation, 443056 2Samara State Medical University, 89 Chapayevskaya Str., Samara, Russian Federation, 443099 Shteiner M.L. ¾ D. Med. Sc., physician-endoscopist, Assistant of endoscopy course of the Surgery Department of Institute of Professional Education, tel. +7-927-207-71-18, e-mail: iishte@yandex.ru Zhestkov A.V. ¾ D. Med. […]