1. Department of Surgical Oncology Medical University of Lublin Lublin Poland
2. Department of General, Gastrointestinal Surgery and Surgical Oncology of the Alimentary Tract Medical University of Lublin Lublin Poland
3. Department of General Surgery and Oncological Surgery Pleszewskie Medical Center Pleszew Poland
4. Department of Surgery and Oncology University of Medical Science Zielona Góra Poland