1. Second Department of Neurology, “Attikon” University Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
2. First Department of Neurology, Eginition Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
3. Department of Neurology, University Hospital of Larissa, School of Health Sciences, Faculty of Medicine, University of Thessaly, Larissa, Greece
4. First Department of Psychiatry, Aiginition Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
5. Allergy Department, “Sotiria” General Hospital, Athens, Greece
6. Department of Hygiene, Epidemiology and Medical Statistics, National and Kapodistrian University of Athens, Athens, Greece
7. Fourth Department of Internal Medicine, Attikon University Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
8. Second Department of Neurology, “Attikon” University Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece; Department of Neurology, University of Tennessee Health Science Center, Memphis, TN, USA