I.I. KHAMZIN1, R.Sh. SHAIMARDANOV2, T.A. GOSTYAEVA1, G.R. ZAKIROVA1, R.F. GUBAEV1, I.I. NURIEV1 1Municipal Clinical Hospital №7, 54 Chuikov Str., Kazan, Russian Federation, 420103 2Kazan State Medical Academy, 36 Butlerov Str., Kazan, Russian Federation, 420012 Khamzin I.I. ― Head of Endoscopy Department, tel. +7-917-275-69-36, e-mail: endohamzin@mail.ru Shaimardanov R.Sh. ― Cand. Med. Sc., Professor of the Surgery […]