1. Department of Neurology School of Medicine University of Ioannina IoanninaGreece
2. Second Department of Neurology ‘Attikon University Hospital’ School of Medicine University of Athens AthensGreece
3. Second Department of Cardiology ‘Attikon University Hospital’ School of Medicine University of Athens AthensGreece
4. Department of Neurology Democritus University of Thrace AlexandroupolisGreece
5. Second Department of Neurosurgery ‘Attikon University Hospital’ School of Medicine University of Athens Athens Greece
6. International Clinical Research Center Department of Neurology St Anne's University Hospital Brno Czech Republic