Mauricio, Arce Mauro, Víctor, Hospital de Clínicas “José de San Martín”, School of Medicine, Buenos Aires University, Argentina Maurovich-Horvat, Pal Mautner, Branco Mavrommatis, Petros P. Mayer, Eckhard, Department of Thoracic Surgery, Kerckhoff Heart and Lung Center, Benekestrasse 2-8, 61231 Bad Nauheim, Germany Mayer, Magdalena Maynard, Robert Mayoral Campos, Victoria, Radiology Department. "Lozano Blesa" University Hospital. Zaragoza. Spain. Mayr, Agnes Mazgaj, Magdalena, Medical University of Warsaw Warsaw Maziarski, Philippe Maziarz, Andrzej Mazin, Israel Mazur, Alexander Mazurak, Magdalena Mazurek, Krzysztof Mazurek, Marta Negrusz-Kawecka i Walentyna Mazurek, Małgorzata Wawrzynek i Walentyna Mazurek, Michał, Department of Cardiology, Congenital Heart Disease and Electrotherapy, Medical University of Silesia, Silesian Center for Heart Diseases, Zabrze, Poland Mazurek, Michał, Department of Cardiology, Congenital Heart Disease and Electrotherapy, Silesian Medical University, Silesian Centre for Heart Diseases, Zabrze, Mazurek, Michał, Department of Cardiology, Congenital Heart Diseases and Electr otherapy, Silesian Medical University, Silesian Center for Heart Diseases Zabrze Mazurek, Ryszard Andrzejak i Walentyna Mazurek, Tomasz, 1st Department of Cardiology, Medical University of Warsaw Warsaw Mazurek, Tomasz (Poland)