1. Haematology Laboratory-Unit of Molecular Biology; University Hospital of Ioannina; Ioannina Greece
2. Neurosurgical Institute; University of Ioannina; Ioannina Greece
3. Department of Neurosurgery; University Hospital of Ioannina; Ioannina Greece
4. Department of Plastic Surgery; University Hospital of Ioannina; Ioannina Greece
5. Department of Neurology; University Hospital of Ioannina; Ioannina Greece