1. Department of Cardiology, J. Strus Hospital, 61-285 Poznań, Poland
2. Analyx sp z o o, 61-887 Poznań, Poland
3. Stochastic Methods Department, System Research Institute, Polish Academy of Sciences, 01-447 Warsaw, Poland
4. Faculty of Medicine and Health Sciences, University of Zielona Góra, 65-417 Zielona Góra, Poland
5. Department of Hypertension, Angiology, and Internal Medicine, Poznan University of Medical Sciences, 61- 848 Poznań, Poland