1. Department of General Surgery, Gastroenterological Oncological Surgery and Plastic Surgery, K. Marcinkowski University of Medical Sciences, Poznan, Poland
2. I Chair of Pediatrics, Department of Gastroenterology and Metabolism, K. Marcinkowski University of Medical Sciences, Poznan, Poland
3. Department of Clinical Pathomorphology K. Marcinkowski University of Medical Sciences, Poznan, Poland
4. Unit of General, Vascular and Oncological Surgery, Regional Hospital Slupsk and Department of Oncological Surgery Medical University Gdansk, Gdansk, Poland
5. Institute of Biomedicine, Division of Physiology and Biocenter Oulu, University of Oulu, Oulu, Finland