1. Department of General and Transplant Surgery, Clinical Hospital of Poznan University of Medical Sciences, 60-355 Przybyszewski St. 49, Poland
2. Anesthesiology and Intensive Care Unit, Clinical Hospital of Poznan University of Medical Sciences, 60-780 Grunwaldzka St. 16/18, Poland
3. Department of Cardiac Surgery and Transplantology, Clinical Hospital of Poznan University of Medical Sciences, 61-848 Długa St. 1/2, Poland
4. CEO Emergency Ambulance Service Poznan, 60-346 Rycerska St. 10, Poland