1. Faculty of Medicine, Palacky University, Krizkovskeho 511/8, 779 00 Olomouc, Czech Republic
2. Sports Cardiology Center, Nemocnice Agel Trinec-Podlesi, Konska 453, 739 61 Trinec, Czech Republic
3. Faculty of Medicine, Masaryk University, Kamenice 735/5, 625 00 Brno, Czech Republic
4. Faculty of Medicine, University of Ostrava, Syllabova 19, 703 00 Ostrava, Czech Republic