krzysztof gutkowski department of gastroenterology, medical university of silesia ul, poland +48 32 7894401, [email protected]; department of gastroenterology, medical university of silesia ul, poland +48 32 7894401, [email protected] marek hartleb department of gastroenterology, medical university of silesia, poland

m mokri department of surgery, shahid beheshti medical university /day general hospital, tehran, iran m guity department of radiology, s shariat torbaghan department of pathology, a arab kheradmand department of surgery, tehran university of medical science, tehran, iran. e arbabai department of surgery, tehran university of medical science, tehran, iran. m bagherzade department of pathology, day general hospital, tehran, iran.