Affiliation: | 1. Student Scientific Circle at the Department of Cardiology, Congenital Heart Diseases and Electrotherapy, Silesian Center of Heart Diseases, Zabrze, Poland;2. Department of Cardiology, Congenital Heart Diseases and Electrotherapy, Silesian Center for Heart Diseases, Zabrze, Poland;3. Department of Congenital Heart Diseases and Pediatric Cardiology, Silesian Center for Heart Diseases, Zabrze, Poland;4. Department of Dietetics, School of Public Health in Bytom, Medical University of Silesia, Katowice, Poland;5. Department of Cardiology, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Katowice, Poland |