1. First Department of Cardiology, Hippocration General Hospital, National and Kapodistrian University of Athens, 157 72 Athens, Greece
2. Department of Radiology, Brigham and Women’s Hospital, Boston, MA 02115, USA
3. Department of Adult Cardiac Surgery, Onassis Cardiac Surgery Center, 176 74 Athens, Greece
4. Department of Cardiology, University Hospital of Patras, 265 04 Patras, Greece
5. Second Cardiology Department, Attikon University Hospital, National and Kapodistrian University of Athens Medical School, Rimini 1, Chaidari, 124 62 Athens, Greece