1. Department of Cardiology, School of Medicine, Sotiria General Hospital, National and Kapodistrian University of Athens,
Athens 11527, Greece
2. Cardiovascular Division, Harvard Medical School, Brigham and Women’s Hospital, Boston, MA, USA
3. Department of Cardiology, School of Medicine, ‘Hippokration’ General Hospital, National and Kapodistrian University of Athens,
Athens, Greece