1. Department of Neurosurgery, General University Hospital of Larissa, 41221 Larissa, Greece
2. Department of Pathophysiology, National and Kapodistrian University of Athens, 11527 Athens, Greece
3. Unit of Endocrinology, First Department of Internal Medicine, Laiko General Hospital, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
4. Department of Biochemistry, Sismanogleio Hospital, 15126 Athens, Greece
5. Laboratory of Clinical Virology, School of Medicine, University of Crete, 71003 Heraklion, Greece
6. Department of Neurosurgery, Nicosia General Hospital, 2029 Nicosia, Cyprus