1 Department Neurology, Coordinator DAMA (Disabled Advanced Medical Assistance), "Annunziata" Hospital, Cosenza, Italy. anto.siniscalchi@libero.it.
2 Department of Health Science, School of Medicine, University of Catanzaro, Clinical Pharmacology and Pharmacovigilance Unit, Mater Domini University Hospital, Catanzaro, Italy.
3 Department of Neurology, Regional Headache Research Center, "Pugliese-Ciaccio" Hospital, Catanzaro, Italy.