I.V. BARKHATOV1, N.A. BARKHATOVA2 1Regional Clinical Hospital No. 3, 287 Pobedy Ave., Chelyabinsk, Russian Federation, 454021 2South Ural State Medical University of the Ministry of Health of the Russian Federation, 64 Vorovskogo Str., Chelyabinsk, Russian Federation, 454092   Contact details: Barkhatov I.V. — Cand. Med. Sc., Head of the Endoscopy Department of the polyclinic, e-mail: knib2009@rambler.ru […]