1. Department of Cardiology and Internal Medicine; Specialist Hospital; Gorlice Poland
2. Faculty of Medicine; Lazarski University; Warsaw Poland
3. Cardiology Department; Medical University of Lublin; Lublin Poland
4. Department of Cardiology; Medical University of Bialystok; Bialystok Poland
5. Department of Cardiology; Health Center MCZ; Lubin Poland
6. Department of Internal Medicine; City Hospital; Rabka-Zdrój Poland
7. Independent Public Healthcare Centre Lukow; Lukow Poland
8. Department of Cardiology; Cardinal Wyszynski’ Hospital; Lublin Poland
9. Department of Statistics; Cracow University of Economics; Cracow Poland
10. Department of Pulmonary Circulation and Thromboembolic Diseases; The Medical Centre of Postgraduate Medication; European Health Centre Otwock; Otwock Poland