R.R. АLIULLOVA¹, L.Е. SLAVIN¹,², I.YU. BORISOVA¹ ¹Kazan State Medical Academy, 11 Mushtari St., Kazan, Russian Federation, 420012 ²Interregional Clinical and Diagnostic Center, 12a Karbysheva St., Kazan, Russian Federation, 420101 Aliullova R.R. — external postgraduate student of the Department of Endoscopy, General and Endoscopic Surgery, tel. +7-917-260-57-05, e-mail: RRAimL@yandex.ru1 Slavin L.E. — D. Med. Sc., Professor of the Department […]