1. Department of Cardiology, Patras University Hospital, Patras, Greece
2. Department of Cardiology, Attikon University Hospital, Athens, Greece, Athens, Greece
3. Department of Cardiology, Ioannina University Hospital, Ioannina, Greece
4. Department of Cardiology, Iraklion University Hospital, Iraklion, Greece
5. Department of Cardiology, Larissa University Hospital, Larissa, Greece
6. Department of Clinical Therapeutics, “Alexandra” University Hospital, Athens, Greece
7. 1st University Department of Cardiology, Ippokration Hospital, Athens, Greece
8. Department of Cardiology, Athens General Hospital “G. Gennimatas”, Athens, Greece