1 Neurosciences Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London London United Kingdom.
2 Neurorehabilitation Unit, IRCCS Centro Neurolesi "Bonino Pulejo," Messina Italy.
3 Department of Promoting Health, Maternal-Infant, Excellence and Internal and Specialized Medicine (ProMISE) G. D'Alessandro University of Palermo Palermo Italy.
4 Internal Medicine and Stroke Care Ward, Policlinico 'P. Giaccone' Palermo Italy.
5 Department of Experimental and Clinical Medicine University of Messina Messina Italy.