Zelek, Leszek Żelek, Tomasz Zeliaś, Aleksander, Clinic of Interventional Cardiology, Institute of Cardiology, Jagiellonian University Medical College, John Paul II Hospital, Krakow, Poland Zelias, Aleksander Zeliaś, Aleksander Zelizko, Michael Zeman, Krzysztof Zemanek, David Zembala, Marek Zembala, Marian, Silesian Center for Heart Diseases, Poland Zembala, Marian Zembala, Marian, Dept of Cardiac Surgery and Transplantology, Silesian Center For Heart Diseases Zabrze Zembala, Marian Zembala, Marian, Department of Cardiac Surgery and Transplantation, Medical University of Silesia, Silesian Center for Heart Diseases, Zabrze Zembala, Marian, Department of Cardiac Surgery and Transplantology, Medical University of Silesia, Silesian Centre for Heart Diseases, Zabrze, Poland (Poland) Zembala, Marian, Śląskie Centrum Chorób Serca w Zabrzu Zembala, Marian, Dept. of Cardiac Surgery, Silesian Center For Heart Diseases, Zabrze, Poland Zembala, Marian, Department of Cardiac Surgery and Transplantology, SMDZ in Zabrze, Medical University of Silesia, Katowice, Poland (Poland) Zembala, Marian, School of Medicine, Silesian Center for Heart Diseases Zembala, Marian (Poland) Zembala, Marian, Silesian Center for Heart Diseases Zembala, Marian Zembala, Michael O. Zembala, Michael Oscar Zembala, Michał Oskar, Department of Cardiac Surgery and Transplantology, Silesian Centre for Heart Diseases, Zabrze, Poland