1. Cardiac Surgery and Transplantology Department, Poznan University of Medical Sciences, 61-848 Poznan, Poland
2. Cardiac Surgery Department, Lazarski University, 02-662 Warszawa, Poland
3. Department of Computer Science and Statistics, Poznan University of Medical Sciences, 61-701 Poznan, Poland
4. Faculty of Medicine, Poznan University of Medical Sciences, 61-701 Poznan, Poland
5. Institute of Clinical Science, Maria Sklodowska-Curie Medical Academy, 00-001 Warsaw, Poland
6. Department of Hypertensiology, Angiology and Internal Medicine, Poznan University of Medical Sciences, 61-848 Poznan, Poland