Kowal, Jarosław Kowal, Joanna Kowal Bielecka, Otylia Kowal-Bielecka, Otylia Kowalczuk, Anetta Kowalczuk, Anetta M. Kowalczuk, Anna Kowalczuk-Kot, Aldona, Uniwersytet Medyczny w Białymstoku Kowalczuk-Wieteska, Anetta, Silesian Centre for Heart Diseases, Zabrze, Poland Kowalczuk-Wieteska, Anetta, Department of Transplantation and Cardiac Surgery, Silesian Centre for Heart Diseases in Zabrze, Zabrze, Poland Kowalczuk-Wieteska, Anetta Kowalczuk-Wieteska, Anetta Kowalczyk, Jacek, Clinical Department of Cardiology Chair of Cardiology, Congenital Heart Diseases and Electrotherapy Medical University of Silesia Kowalczyk, Jacek, Department of Cardiology, Congenital Heart Diseases, and Electrotherapy, Medical University of Silesia, Silesian Center of Heart Diseases, Zabrze, Poland (Poland) Kowalczyk, Jacek, Department of Cardiology, Congenital Heart Disease and Electrotherapy, Silesian Medical University, Silesian Centre for Heart Diseases Kowalczyk, Jacek, Department of Cardiology, Congenital Heart Diseases, and Electrotherapy, Medical University of Silesia, Silesian Centre for Heart Diseases Kowalczyk, Jacek Kowalczyk, Jacek Kowalczyk, Małgorzata Kowalczyk, Małgorzata Kowalczyk, Monika Kowalczyk, Monika, The Children's Memoeial Health Institute Kowalczyk, Stanisław Tomasz Kowalczyk, Stefan Tomasz Kowalczyk, Waldemar