1. Department of Nephrology, Transplantation and Internal Medicine School of Medicine in Katowice, Medical University of Silesia Katowice Poland
2. Department of General, Vascular and Transplant Surgery School of Medicine in Katowice, Medical University of Silesia Katowice Poland
3. Department of Internal Medicine and Oncological Chemotherapy School of Medicine in Katowice, Medical University of Silesia Katowice Poland
4. Department of Biostatistics School of Health Sciences in BytomMedical University of Silesia Katowice Poland