1. Department of General and Bariatric Surgery and Emergency Medicine in Zabrze, Medical University of Silesia, Katowice, Poland
2. Department of Microbiology and Immunology in Zabrze, Medical University of Silesia, Katowice, Poland
3. Third Department of Cardiology, Silesian Centre for Heart Disease, School of Medicine, Division of Dentistry, Zabrze, Medical University of Silesia, Katowice, Poland
4. Department of General and Vascular Surgery, University Hospital, Opole, Poland
5. Chair and Department of Biophysics, Medical University of Silesia, Katowice, Poland