1. Heart Failure and Transplantology Department, Cardinal Stefan Wyszynski National Institute of Cardiology, Warsaw, Poland
2. Department of Epidemiology, Cardiovascular Disease Prevention and Health Promotion Cardinal Stefan Wyszynski National Institute of Cardiology, Warsaw, Poland
3. Department of Statistics and Econometrics, Faculty of Economic Science, University of Warsaw, Poland
4. 3rd Department of Cardiology, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Katowice, Poland
5. Silesian Centre for Heart Disease, Zabrze, Poland