1. Second Department of Neurology, Attikon Hospital, School of MedicineNational and Kapodistrian University of Athens Athens Greece
2. Department of Neurology, St Josef HospitalRuhr University Bochum Bochum Germany
3. Department of NeurologyWest Virginia University–Charleston Division Charleston WV
4. Department of NeurologyUniversity of Tennessee Health Science Center Memphis TN
5. Department of NeurosurgeryUniversity of Tennessee Health Science Center and Semmes‐Murphey Clinic Memphis TN
6. Department of Neurology and Neurogeriatry, Johannes Wesling Medical CenterRuhr University Bochum Minden Germany
7. Department of NeurologyEssen University Hospital Essen Germany
8. Department of NeurologySaint Anne Hospital Paris France
9. Paris Descartes University Paris France
10. National Institute of Health and Medical Research U1266 Paris France
11. NeuroVasc University Hospital DepartmentSorbonne Paris Cité Paris France
12. Metropolitan Hospital Piraeus Greece
13. University of Lille, National Institute of Health and Medical Research U1171Lille University Hospital Center Lille France
14. Department of NeurologyKarolinska University Hospital Solna Stockholm Sweden
15. Department of Clinical NeuroscienceKarolinska Institute Stockholm Sweden
16. University of Cincinnati Cincinnati OH
17. Departments of Radiology and Clinical NeurosciencesUniversity of Calgary Calgary Alberta Canada
18. Department of Radiology, Seaman Family Magnetic Resonance Research CentreFoothills Medical Centre Alberta Canada