1. From the Stroke Research Group (U.J.-K., J.-C.B.), University of Cambridge, Department of Clinical Neurosciences, Addenbrooke's Hospital, Cambridge, UK; Wolfson Brain Imaging Centre (U.J.-K.), Department of Clinical Neurosciences, University of Cambridge, UK; and INSERM U894 (J.-C.B.), Université Paris, Descartes, Sorbonne Paris Cite, Paris, France.