Boeckstaens, Sven Boeddinghaus, Jasper Boersma, Eric Bogacki, Piotr, Department of Cardiology, Ludwik Rydygier District Hospital, Krakow Bogdan, Maria Bogossian, Harilaos, Medical Clinic II Cardiology and Angiology Klinikum Lüdenscheid Lüdenscheid Bogossian, Harilaos, Klinikum Lüdenscheid, Universität Witten-Herdecke, Medizinische Klinik III, Paulmannhöherstr. 14, 58515 Lüdenscheid Boguslawski, Stefan Boguszewski, Andrzej Bogyi, Peter, Medical Centre - Hungarian Defence Forces Bohdan, Michał Bohdan, Michał Bohm, Allan Boidol, Joanna, Department of Cardiology, Congenital Heart Disease and Electrotherapy, Medical University of Silesia, Silesian Center for Heart Diseases, Zabrze, Poland Boinska, Joanna Bojanowicz, Wojciech Bojarczuk, Joanna Bojarski, Grzegorz Bojko, Krystian, Department of Cardiology, Regional Specialist Hospital in Olsztyn, Poland Bojko, Krystian Bojko, Krystian Bolca, Osman, Dr.Siyami Ersek Thoracic andCardiovascular Surgery Research and Training Hospital , İstanbul Boldt, Leif-Hendrik Boldt, Leift-Hendrik Bolińska, Halina