1. “Prof. CC Iliescu” Institute for Cardiovascular Diseases , Cardiology Department , Bucharest , Romania
2. “Carol Davila” University of Medicine and Pharmacy , Bucharest , Romania
3. Tulcea County Hospital , Cardiology Department , Tulcea , Romania
4. Colentina Clinical Hospital , Cardiology Department , Bucharest , Romania
5. University of Bristol , Faculty of Health Sciences , Bristol , United Kingdom