1. Cardiology Clinic Clinical Center of Serbia Belgrade Serbia
2. School of Medicine Belgrade University Belgrade Serbia
3. Cardiology Clinic University Clinical Center of Kragujevac Kragujevac Serbia
4. Clinical Center Sestre Milosrdnice Zagreb Croatia
5. Clinic of Cardiology University Hospital Center Mother Theresa Tirana Albania
6. Cardiology Clinic Medical Faculty University Clinical Center of Montenegro University of Podgorica Podgorica Montenegro
7. National Heart Hospital Coronary Care Unit Sofia Bulgaria
8. Clinic of Internal Medicine Department of Intensive Care and Therapy University Clinical Center Tuzla Tuzla Bosnia and Herzegovina
9. Cardiology Department Colentina University Hospital Bucharest Romania
10. Clinic of Internal Medicine Cardiology Department Medical Faculty University Clinical Center Tuzla Tuzla Bosnia and Herzegovina
11. Medicine University "Carol Davila" Colentina University Hospital Bucharest Romania
12. Liverpool Centre for Cardiovascular Science University of Liverpool and Liverpool Heart & Chest Hospital Liverpool UK