1. Department of General, Vascular and Transplantation Surgery, The Medical University of Warsaw, Warsaw, Poland
2. Department of General and Transplantation Surgery, The Medical University of Warsaw, Warsaw, Poland
3. Department of Emergency Medicine, The Medical University of Warsaw, Warsaw, Poland
4. Department of Gastroenterological and Transplantation Surgery, Central MSW Hospital, Warsaw, Poland
5. Department of General, Vascular and Transplantation Surgery, Silesian Medical University, Katowice, Poland
6. Department of General and Transplantation Surgery, The Medical University of Warsaw, Warsaw, Poland