1. Pathophysiology Unit, Department of Pathophysiology, School of Medicine in Katowice, Medical University of Silesia in Katowice, Katowice, Poland;
2. Dialysis Center in Katowice "NEFROMED", Centrum Dializa Sosnowiec, Katowice, Poland;
3. Department of Nephrology, Transplantation and Internal Medicine, School of Medicine in Katowice, Medical University of Silesia in Katowice, Katowice, Poland;
4. Department of Nephrology with Dialysis Unit, MSWiA Hospital, Katowice, Poland;
5. Department of Health Promotion and Community Nursing, School of Health Sciences, Medical University of Silesia in Katowice, Katowice, Poland;
6. Department of Internal Medicine and Oncological Chemotherapy, School of Medicine in Katowice, Medical University of Silesia in Katowice, Katowice, Poland