1. Department of Hygiene, Epidemiology and Medical Statistics; School of Medicine; National and Kapodistrian University of Athens; Athens Greece
2. Cardiovascular Prevention and Research Unit; Department of Pathophysiology; School of Medicine; National and Kapodistrian University of Athens; Athens Greece
3. Health Centre of Velestino; Ahillopouleio General Hospital of Volos; Velestino Volos Greece
4. Second Department of Neurology; Attikon University General Hospital; School of Medicine; National and Kapodistrian University of Athens; Chaidari Athens Greece
5. First Department of Neurology; Eginition Hospital; School of Medicine; National and Kapodistrian University of Athens; Athens Greece
6. First Department of Psychiatry; Eginition Hospital; School of Medicine; National and Kapodistrian University of Athens; Athens Greece
7. First Department of Cardiology; Hippokrateion Hospital; School of Medicine; National and Kapodistrian University of Athens; Athens Greece