1. NEUROFARBA Department, University of Florence, Florence, Italy
2. Stroke Unit and Neurology, Careggi Hospital, Florence, Italy
3. Department of Medical Imaging, University of Toronto, Toronto, Canada
4. Acute Stroke Program, Department of Medicine and Clinical Geratology, University of Oxford, Oxford, UK
5. Calgary Stroke Program, Department of Clinical Neurosciences, Hotchkiss Brain Institute, University of Calgary, Calgary, Canada