1. Department of Heart Diseases Wroclaw Medical University Borowska 213 Wrocław 50‐556 Poland
2. Collegium Medicum Cardinal Stefan Wyszyński University in Warsaw Warsaw Poland
3. Cardiology, The Department of Medical and Surgical Specialties, Radiological Sciences and Public Health University of Brescia Brescia Italy
4. MOMENTUM Research Durham NC USA
5. Centre for Heart Diseases Military Hospital Wrocław Poland
6. Student Scientific Organization, Department of Heart Diseases Wroclaw Medical University Wrocław Poland