Opolski, Grzegorz, Department of Cardiology, Medical University of Warsaw, Warsaw, Poland Opolski, Grzegorz, I Katedra i Klinika Kardiologii Warszawski Uniwersytet Medyczny Opolski, Grzegorz, Department of Cardiology, Medical University of Warsaw Opolski, Grzegorz, First Department of Cardiology, Medical University of Warsaw (Poland) Opolski, Grzegorz, First Department of Cardiology and Cardiosurgery, Medical University of Warsaw, Poland Opolski, Grzegorz, The 1st Chair and Department of Cardiology, Medical University of Warsaw, Poland (Poland) Opolski, Grzegorz Opolski, Grzegorz Opolski, Grzegorz G Opolski, Maksymilian Opolski, Maksymilian P Opolski, Maksymilian Przemysław Opolski, Maksymilian P. Opuchlik, Andrzej Orantek, Szymon Orban, Marek Orczykowski, Cezary Orczykowski, Michał Orczykowski, Michał, Institute of Cardiology (Poland) Orczykowski, Michał, Department of Arrhythmia, Institute of Cardiology, Warsaw Orczykowski, Michał, Instytut Kardiologii, Klinika Zaburzeń Rytmu Serca Alpejska 42 04-628 Warszawa Orczykowski, Michał Orczykowski, Michał (Poland) Orczykowski, Michał Orda, Alina