1. Department of Cardiology; Patras University Hospital; Patras Greece
2. Department of Cardiology; Athens General Hospital ‘G. Gennimatas’; Athens Greece
3. Department of Cardiology; Iraklion University Hospital; Iraklion Greece
4. Department of Cardiology; Larissa University Hospital; Larissa Greece
5. Department of Clinical Therapeutics; ‘Alexandra’ University Hospital; Athens Greece
6. 1 University Department of Cardiology; Ippokration Hospital; Ioannina Greece
7. Department of Cardiology; Ioannina University Hospital; Ioannina Greece