1. Department of Anatomy-Histology-Embryology, Faculty of Medicine, University of Ioannina, Ioannina, Greece.
2. 3rd Department of Internal Medicine, Athens School of Medicine, National and Kapodistrian University of Athens, Sotiria General Hospital, Athens, Greece.
3. Neurosurgical Institute, University of Ioannina, Ioannina, Greece.
4. Department of Environmental and Natural Resources Management, University of Patras, Patra, Greece.
5. Department of Neurology, Faculty of Medicine, University of Ioannina, Ioannina, Greece.