1. Calgary Stroke Program, Departments of Clinical Neurosciences and Radiology, Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Alberta, Canada (H.G., J.F., M.D.H., A.D., M.G., B.K.M.).
2. Department of Neurology, Stroke Center, University Hospital Basel, University of Basel, Switzerland (H.G., J.F.).
3. King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia (F.A.-A.).
4. Department of Medicine and Neurology, Melbourne Brain Centre at the Royal Melbourne Hospital (B.C.V.C.), University of Melbourne, Parkville, Australia.
5. Department of Radiology and Nuclear Medicine, Amsterdam University Medical Centers, location AMC, the Netherlands (C.B.L.M.M.).
6. Department of Diagnostic and Interventional Neuroradiology, INSERM U 1254 (S.B.), Université de Lorraine, University Hospital of Nancy, France.
7. Institute of Neuroscience and Psychology, University of Glasgow, Queen Elizabeth University Hospital, United Kingdom (K.W.M.).
8. Department of Interventional Neuroradiology, CDI, Hospital Clinic of Barcelona, Spain (L.S.R.).
9. Department of Radiology and Nuclear Medicine (A.v.d.L.), Erasmus MC University Medical Center, Rotterdam, the Netherlands.
10. Department of Neurology and Comprehensive Stroke Center (D.S.L.), David Geffen School of Medicine at the University of California, Los Angeles.
11. Altair Biostatistics, St Louis Park, MN (S.B.).
12. Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University and Newcastle upon Tyne Hospitals NHS Trust, United Kingdom (P.M.W.).
13. INSERM CIC 1433 Clinical Epidemiology (F.G.), Université de Lorraine, University Hospital of Nancy, France.
14. Department of Neuroscience, Hospital Germans Trias i Pujol, Universitat Autònoma de Barcelona, Spain (A.D.).
15. Stroke Institute, Department of Neurology, University of Pittsburgh Medical Center, PA (T.G.J.).
16. Department of Neurology (J.L.S.), David Geffen School of Medicine at the University of California, Los Angeles.
17. Department of Neurology (D.W.J.D.), Erasmus MC University Medical Center, Rotterdam, the Netherlands.
18. Department of Radiology, Royal Melbourne Hospital (P.J.M.), University of Melbourne, Parkville, Australia.