1 Department of Cardiology and Electrotherapy, Medical University of Gdansk, Gdańsk, Poland.
2 Cardiology Department with the Acute Coronary Syndromes Subdivision, Clinical Provincial Hospital No. 2, Rzeszów, Poland.
3 Medical College, University of Rzeszow, Rzeszów, Poland.
4 Department of Cardiology and Electrotherapy, Medical University of Gdansk, Gdańsk, Poland. budrejko@gumed.edu.pl.
5 Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland.
6 Department of Electrocardiology, Medical University of Lodz, Łódź, Poland.
7 3rd Department of Cardiology, School of Medicine with the Division of Dentistry in Zabrze, Silesian Centre for Heart Diseases, Medical University of Silesia, Katowice, Poland.
8 2nd Department of Arrhythmia, National Institute of Cardiology, Warszawa, Poland.
9 1st Department of Cardiology and Angiology, Silesian Centre of Heart Diseases, Zabrze, Poland.
10 1st Chair and Department of Cardiology, Medical University of Warsaw, Warszawa, Poland.
11 Department of Cardiology, Centre for Heart Diseases, 4th Military Hospital, Wrocław, Poland.
12 1st Department of Cardiology, Chair of Cardiology, Karol Marcinkowski University of Medical Sciences, Poznań, Poland.
13 Department of Heart Diseases, Wroclaw Medical University, Wrocław, Poland.
14 Department of Cardiology and Internal Diseases, Military Institute of Medicine, Warszawa, Poland.
15 1st Department of Arrhythmia, National Institute of Cardiology, Warsaw, Poland.
16 Department of Electrocardiology, John Paul II Hospital, Kraków, Poland.
17 1st Department of Cardiology, Upper-Silesian Medical Centre of the Silesian Medical University in Katowice, Katowice, Poland.