1. Stroke Unit, Department of Neurology (A.G.-T., M. Rubiera, M. Requena, M.M., J.P., D.R.-L, M.D., J.J., N.R.-V., S.B., M.O.-G., E.S., J.A.-S., C.A.M., M. Ribó), Hospital Vall d’Hebron, Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain.
2. Stroke Unit, Neurology Unit, Department of Neuroscience, Ospedale Civile, Azienda Ospedaliera Universitaria di Modena, Italy (L.C.).
3. Department of Neuroradiology (A.T., C.P., D.H.), Hospital Vall d’Hebron, Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain.