1. Department of Neurological Surgery, Hospital Clinic de Barcelona, University of Barcelona;
2. Department of Neurological Surgery, Germans Trias i Pujol University Hospital;
3. Comprehensive Stroke Center, Department of Neurology, Hospital Clinic de Barcelona, University of Barcelona and August Pi I Sunyer Biomedical Research Institute (IDIBAPS); and
4. Department of Radiology, Hospital Clinic de Barcelona, University of Barcelona, Barcelona, Spain