1. Faculty of Medicine and Health Sciences, Andrzej Frycz Modrzewski Cracow University, 30-705 Kraków, Poland
2. 1st Department of Cardiology, Medical University of Warsaw, 02-091 Warsaw, Poland
3. Department of Cardiology and Structural Heart Diseases, Medical University of Silesia, 40-055 Katowice, Poland
4. 1st Department of Cardiology, Poznan University of Medical Sciences, 61-701 Poznań, Poland
5. Faculty of Medicine, Jagiellonian University Medical College, 31-008 Kraków, Poland
6. Faculty of Medicine, Collegium Medicum, Cardinal Stefan Wyszynski Institute of Cardiology, 01-938 Warsaw, Poland
7. Department of Cardiology, Voivodeship Hospital in Łomża, 18-404 Łomża, Poland
8. Provincial Specialist Hospital in Wloclawek, 87-800 Włocławek, Poland
9. Department of Cardiology, Scanmed, 99-320 Kutno, Poland
10. Department of Interventional Cardiology, Institute of Cardiology, Jagiellonian University Medical College, św. Anny 12, 31-007 Kraków, Poland
11. Department of Interventional Cardiology, The John Paul II Hospital, Prądnicka 80, 31-202 Kraków, Poland
12. Department of Cardiology, National Institute of Medicine of the Ministry of Internal Affairs and Administration, 02-507 Warsaw, Poland
13. Centre of Postgraduate Medical Education, 01-813 Warsaw, Poland
14. Provincial Specialist Hospital in Wroclaw, 51-124 Wrocław, Poland
15. Department of Internal Medicine and Cardiology, Medical University of Warsaw, 02-091 Warsaw, Poland
16. 1st Department of Cardiology, Medical University of Gdańsk, 80-210 Gdańsk, Poland
17. Department of Cardiology, Wroclaw Medical University, 50-556 Wrocław, Poland
18. Department of Cardiology-Intensive Therapy and Internal Diseases, Poznan University of Medical Sciences, 60-355 Poznań, Poland