1. Departments of Radiology (M.A., S. Ning, M.M.Q., P.K., Z.M., J.B., M.K., T.N.N.), Boston Medical Center.
2. Radiation Oncology (M.M.Q.), Boston Medical Center.
3. Departments of Neurology, Grady Memorial Hospital (D.C.H., M.H.M., R.G.N.).
4. Departments of Neurology (D. Strbian, L.T., N.M.-M.), Helsinki University Hospital, Finland.
5. Department of Neurology, Klinikum Ludwigshafen, Germany (S. Nagel).
6. Departments of Neurology (S. Nagel, P.A.R.). Heidelberg University Hospital, Germany.
7. Laboratory for Neurobiology, KU Leuven, Belgium (J.D., R.L., L.V., A.W.).
8. Department of Neurology, UZ Leuven, Belgium (J.D., R.L., L.V., A.W.).
9. Department of Neurology (V.P., S.W.), University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany.
10. Dresden Neurovascular Center, Germany (V.P., S.W., D.P.O.K.).
11. Department of Neurology, Hospital Vall d’Hebron, Spain (M.O.G., F.R., M.R.).
12. Department of Stroke Neurology, NHO Osaka National Hospital, Japan (H.Y.).
13. Department of Cerebrovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Japan (K.T.).
14. Department of Neurology, University of Lille, CHU Lille, Inserm, France (H.H., F.C., C.C.).
15. Department of Neurology, UTHealth McGovern Medical School, Houston (S.A.S., S.S.-M.).
16. Department of Neurology, University of Iowa (S.O.-G., M.F.).
17. Department of Neurology, Hôpital Civil Marie Curie, Charleroi, Belgium (A.D., F.B.).
18. Department of Neurology, University of Toledo, Toledo (S.F.Z., A.C.C.).
19. Department of Neurology, University of Chicago (J.E.S.).
20. Clinical Neurosciences, University of Cambridge, United Kingdom (S. Nannoni).
21. Department of Diagnostic and Interventional Neuroradiology, University Hospital Bern, Switzerland (J.K., T.D., A.M.).
22. Radiology (P.V., T.K.), Helsinki University Hospital, Finland.
23. Radiology (J.J., M.A.M.). Heidelberg University Hospital, Germany.
24. Departments of Neurology (J.P.M., R.V.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Occidental, Portugal.
25. Department of Neurosurgery, Hyogo Medical University, Japan (K.U., S.Y.).
26. Interventional Neuroradiology, University of Massachusetts Memorial Medical Center (A.S.P.).
27. Department of Neurology, State University of New York (H.E.M.).
28. Radiology (J.N.R.), Hospital de Egas Moniz, Centro Hospitalar Lisboa Occidental, Portugal.
29. Department of Neurology, Lausanne University Hospital, Switzerland (D. Strambo, P.M.).
30. Neuroscience and Stroke Program, Mercy Health St. Vincent Hospital, Toledo (E.L., O.O.Z.).
31. Institute of Neuroradiology (D.P.O.K.), University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany.
32. Neurovascular Research, Kobe City Medical Center General Hospital, Japan (N.S.).
33. Interventional Neuroradiology, CHU Montreal, Canada (D.R., J.R.).
34. Department of Neurology, University Hospital Basel, Switzerland (U.F.).
35. Department of Neurology, University of Pittsburgh Medical Center (R.G.N.).
36. Neurology (T.N.N.), Boston Medical Center.