1. From the Stroke Unit, IRCCS Mondino Foundation, Pavia, Italy (A.M.); Department of Medicine (Neurology), University of Ottawa, Ottawa Hospital Research Institute, Canada (D.D., F.A.-A.)
2. Department of Neuroradiology, Université Paris Descartes, INSERM S894, DHU Neurovasc, Centre Hospitalier Sainte-Anne, France (G.B.)
3. Department of Clinical Neurosciences, Department of Radiology, Hotchkiss Brain Institute, University of Calgary, Canada (A.M.D.)
4. Division of Neuroradiology and Department of Medical Imaging, Sunnybrook Health Sciences Centre, University of Toronto, Canada (R.I.A.)
5. Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston (L.Y., Y.C.)
6. J. P. Kistler Stroke Research Center, Massachusetts General Hospital, Harvard Medical School, Boston (J.M.R., K.S., M.E.G., A.V., C.D.A., S.M.G., J.R., J.N.G.)
7. Neuroradiology Service, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston (J.M.R.)
8. Division of Neurocritical Care and Emergency Neurology, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston (C.D.A., J.R., J.N.G.)
9. Zeenat Qureshi Stroke Research Center, University of Minnesota, Minneapolis (A.I.Q.).
10. Department of Emergency Medicine, Massachusetts General Hospital, Harvard Medical School, Boston (J.N.G.)