From the Stroke Unit (A.C., X.U.), Hospital Clínic and Institut d’ Investigacions Biomédiques August Pi i Sunyer (IDIBAPS). University of Barcelona, Spain; and the Pharmacology and Toxicology Department (A.M.P.), Consejo Superior de Investigaciones Científicas (IIBB-CSIC) and IDIBAPS, Barcelona, Spain. (At 2007-03)