1. Institute of Medical Sciences, Jan Kochanowski University, 25-369 Kielce, Poland
2. Department of Acute Cardiac Care, Świetokrzyskie Cardiology Center, 25-736 Kielce, Poland
3. 2nd Department of Cardiology, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 41-800 Zabrze, Poland
4. Department of Cardiology, Medical University of Lublin, 20-059 Lublin, Poland
5. Department of Cardiac Surgery, Świetokrzyskie Cardiology Center, 25-736 Kielce, Poland
6. Department of Cardiology, The Pope John Paul II Province Hospital, 22-400 Zamość, Poland
7. Department of Cardiac Surgery, The Pope John Paul II Province Hospital, 22-400 Zamość, Poland