1. Department of Cardiac Surgery Medical University of Lublin Lublin Poland
2. Department of Medicine and Health Sciences Jan Kochanowski University Kielce Poland
3. 2nd Department of Cardiology Silesian Medical University Zabrze Poland
4. Department of Cardiology Surgery The Pope John Paul II Province Hospital of Zamość Zamość Poland
5. Department of Cardiac Surgery The Pope John Paul II Province Hospital of Zamość Zamość Poland
6. Department of Cardiology Medical University of Lublin Lublin Poland