1. First Department of General, Oncological and Gastroenterological Surgery, Collegium Medicum, Jagiellonian University, Cracow, Poland
2. Department of General and Colorectal Surgery, Medical University of Lodz, Lodz, Poland
3. Department of General and Colorectal Surgery, Poznan University of Medical Sciences, Poznan, Poland
4. Department of General, Colorectal and Trauma Surgery, Medical University of Silesia, Sosnowiec, Poland
5. Department of Colorectal, General and Oncological Surgery, Centre of Postgraduate Medical Education, Warsaw, Poland
6. Department of General and Endocrine Surgery and Gastroenterological Oncology, Poznan University of Medical Sciences, Poznan, Poland
7. Second Department of General, Gastroenterological and Digestive System Tumor Surgery, Medical University of Lublin, Lublin, Poland