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 Boidol, Joanna 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 Bolkowski, Maciej Bollin, Paweł Bollmann, Andreas Bollow, Armin Bollow, Armin (Germany) Bologna, Fabrizio, Cardiac Arrhythmia Research Centre, Centro Cardiologico Monzino, IRCCS, Milan , Italy Bonakdar, Hamid Reza Bonakdar, Hamid Reza, Department of Pacemaker and Cardiac Electrophysiology, Rajaie Cardiovascular Medical and Research Centre, Tehran, Iran Bonato, Ricardo, Hospital Ramos Mejia, Buenos Aires