1. Department of Cardiology; Instituto Cardiovascular de Buenos Aires; Buenos Aires Argentina
2. Cardiology Department; Royal Victoria Hospital; Belfast Northern Ireland United Kingdom
3. Department of Cardiac Surgery and Department of Images; Instituto Cardiovascular de Buenos Aires; Buenos Aires Argentina
4. Cardiology Department, the Third Faculty of Medicine, Charles University & University Hospital Royal Vineyards; Prague Czech Republic
5. Herz-Zentrum Bad Krozingen; Bad Krozingen Germany
6. Department of Cardiology; Heart Centre at the Isar; Munich Germany
7. Department of Medicine; Division of Cardiology; Columbia University Medical Center and NewYork-Presbyterian Hospital; New York New York
8. Department of Cardiology & Catheterization Laboratories; Shonan Kamakura General Hospital; Kamakura City Japan