1. G D'Andrea, AR Cananzi, M Morra, F Zamberlan, F Ferro Milone, Regional Center for the Study of Headache and Cerebrovascular Disease, Department of Neurology, San Bortolo Hospital, Vicenza, Italy; R Joseph, S Grunfeld, KMA Welch, Center for Stroke Research, Department of Neurology, Henry Ford Hospital, Detroit, MI, USA;