1 | 1st Chair and Department of Cardiology, Medical University of Warsaw, Warszawa, Poland |
2 | Department of Cardiology, Congenital Heart Diseases and Electrotherapy, Silesian Center for Heart Diseases, Silesian Medical University, Zabrze, Poland |
3 | Department of Cardiology, Pomeranian Medical University, Szczecin, Poland |
4 | 1st Department of Cardiology, Poznan University of Medical Sciences, Poznan, Poland |
5 | Department of Hypertension and Diabetology, Medical University of Gdansk, Gdansk, Poland |
6 | Department of Heart Arrhythmia, Institute of Cardiology, Warsaw, Poland |