1. Department of Pathophysiology, National and Kapodistrian University of Athens, Athens, Greece
2. Department of Neurology, ‘P & A Kyriakou’ Children’s Hospital, Athens, Greece
3. Department of Neurology, 251 Hellenic Air Force Military Hospital, Athens, Greece
4. Third Department of Pediatrics, National and Kapodistrian University of Athens, Athens, Greece
5. Second Department of Pediatrics, Aristotle University of Thessaloniki, Thessaloniki, Greece
6. Neuroimmunology Unit, Department of Pathophysiology, Faculty of Medicine, National and Kapodistrian University of Athens, Greece