1. Neurology Service and Stroke Unit, AO Brotzu Hospital; Cagliari Italy
2. Department of Medical Sciences and Public Health; University of Cagliari; Cagliari Italy
3. Neurology Service, Sirai Hospital Carbonia; Italy
4. Neurology Service, Nostra Signora della Mercede Hospital; S. Gavino Monreale Italy
5. Institute of Molecular and Clinical Sciences; St George's University of London; London United Kingdom