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