1. Department of Pediatric Infectious Diseases, Wroclaw Medical University, Ludwika Pasteura 1, 50-367 Wrocław, Poland
2. Department of Physiology and Pathophysiology, Wroclaw Medical University, Ludwika Pasteura 1, 50-367 Wrocław, Poland
3. Department of Pediatric Cardiology, Regional Specialist Hospital in Wroclaw, Research and Development Center, Kamieńskiego 73a, 51-124 Wrocław, Poland
4. Pediatric Cardiology Department, Medical University of Silesia, Medyków 16, 40-752 Katowice, Poland