Krzysztof Kaliszewski1, Danuta Szkudlarek2, Michał Kasperczak3, Łukasz Nowak1. 1. 1st Department and Clinic of General, Gastroenterological and Endocrine Surgery, Wroclaw Medical University, Wrocław, Poland. 2. Department of Pathomorphology, Wroclaw Medical University, Wrocław, Poland. 3. Department of Physiotherapy, Wroclaw Medical University, Wrocław, Poland.