1 Stroke Research Program, Institute of Biomedicine of Seville (IBIS)/ University Hospital Virgen del Rocio/CSIC/University of Seville, Seville, Spain.
2 Department of Radiology, University Hospital Virgen del Rocio, Seville, Spain.
3 Department of Radiology, Vall d'Hebron University Hospital, Barcelona, Spain.
4 Neurovascular Research Laboratory, Vall d'Hebron Research Institute (VHIR), Barcelona, Spain.
5 Department of Neurology, University Hospital Virgen Macarena, Seville, Spain.