1 3rd Department of Cardiology, Silesian Center for Heart Diseases, Zabrze, Poland. k_myrda@interia.pl.
2 3rd Department of Cardiology, Silesian Center for Heart Diseases, Zabrze, Poland.
3 Department of Cardiac Surgery, Heart and Lung Transplantation and Mechanical Circulatory Support, Silesian Center For Heart Diseases, Zabrze, Poland.
4 3rd Department of Cardiology, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, Katowice, Poland.