1. Department of Neurology, School of Medicine; Democritus University of Thrace; Alexandroupolis Greece
2. Second Department of Neurology, School of Medicine; University of Athens, Attikon Hospital; Athens Greece
3. Second Department of Internal Medicine, Research Institute and Diabetes Center; Athens University Medical School, Attikon University Hospital; Athens Greece
4. Third Surgical Department, Vascular Unit; Attikon Teaching Hospital, University of Athens; Athens Greece
5. Center of Excellence in Biotechnology Research; King Saud University; Riyadh Saudi Arabia
6. First Department of Pediatrics; University of Athens School of Medicine; Athens Greece