1. Collegium Medicum Jan Kochanowski University in Kielce Kielce Poland
2. First Department of Cardiology Poznan University of Medical Sciences Poznan Poland
3. Department of Cardiology Medical University of Silesia Katowice Poland
4. Second Department of Cardiology Jagiellonian University Medical College Krakow Poland
5. Department of Interventional Cardiology Institute of Cardiology in Warsaw Warsaw Poland
6. Department of Cardiology Silesian Heart Center Zabrze Poland