1. Department of General Surgery and Transplantation, Pomeranian Medical University, 70-111 Szczecin, Poland
2. Department of Nephrology and Kidney Transplantation, Provincial Integrated Hospital, Arkońska 4, 71-455 Szczecin, Poland
3. Clinical Department of Nephrology, Transplantology and Internal Medicine, Pomeranian Medical University, 70-111 Szczecin, Poland