1. Department of CardiologyAthens General Hospital “G. Gennimatas”Athens Greece
2. 1st Department of Cardiology, School of MedicineNational and Kapodistrian University of AthensAthens Greece
3. 2nd Department of CardiologyEvangelismos General HospitalAthens Greece
4. Athens Heart CenterAthens Medical CenterMarousi Greece
5. 2nd Department of CardiologyHygeia HospitalMarousi Greece