1. Department of Neurology, University Hospital of Ioannina, Ioannina, Greece
2. School of Medicine, European University Cyprus, Nicosia, Cyprus
3. Department of Physiology, Faculty of Medicine, School of Health Sciences, University of Ioannina, Ioannina, Greece
4. Department of Rheumatology, University Hospital of Ioannina, Ioannina, Greece