1. Department of Pathophysiology, Poznan University of Medical Sciences, Poznan, Poland
2. Department of Rheumatology and Rehabilitation, Poznan University of Medical Sciences, Poznan, Poland
3. Department of Computer Science and Statistics, Poznan University of Medical Sciences, Poznan, Poland
4. Department of Transfusion Medicine, Charité-Universitätsmedizin Berlin, Berlin, Germany
5. Department of Medicine I, Nephrology, Transplantation and Medical Intensive Care, University Witten/Herdecke, Medical Center Cologne-Merheim, Cologne, Germany