1. Department of Physiology, Faculty of Medicine, School of Health Sciences, University of Ioannina, 451 10 Ioannina, Greece
2. Department of Neurology, Faculty of Medicine, School of Health Sciences, University Hospital of Ioannina, 455 00 Ioannina, Greece
3. Medical School, University of Cyprus, 2029 Nicosia, Cyprus
4. Department of Biological Applications and Technology, University of Ioannina, 451 10 Ioannina, Greece