1. Department of Neurology Medical University of Innsbruck Innsbruck Austria
2. Department of Neurology Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental Lisbon Portugal
3. Stroke Centre, Neurology Service, Department of Neurological Sciences Lausanne University Hospital Lausanne Switzerland
4. Department of Internal Medicine, Faculty of Medicine, School of Health Sciences University of Thessaly Larissa Greece
5. Department of Neurology, Radiology, Boston Medical Center Boston University School of Medicine Boston Massachusetts USA
6. VASCage Research Center on Vascular Ageing and Stroke Innsbruck Austria
7. Departments of Radiology, Neurology and Neurosurgery Grady Memorial Hospital Atlanta Georgia USA