1. Department and Clinic of General Surgery, Gastroenterology and Endocrinology, Karol Marcinkowski University of Medical Science in Poznan, Poznan, Poland
2. Department and Clinic of Anaesthesiology and Intensive Care, Karol Marcinkowski University of Medical Science in Poznan, Poznan, Poland
3. Unit of Clinical Radiology, Karol Marcinkowski University of Medical Science in Poznan, Poznan, Poland