1. Neurology Unit, Department of Neurological Sciences and Vision, ASST-Spedali Civili, Brescia, Italy (A.M.).
2. Neuroradiology Department, University Hospital of Tours, CEDEX 09, Tours, France (G.B.).
3. Department of Radiology (CCM), Charité - Universitätsmedizin Berlin, Campus Mitte, Humboldt-Universität zu Berlin, Freie Universität Berlin, Berlin Institute of Health, Germany (J.N.).
4. Berlin Institute of Health (BIH), BIH Biomedical Innovation Academy, Germany (J.N., F.S.).
5. Department of Neurology, The Second Affiliated Hospital of Anhui Medical University, China (Q.L.).
6. Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, China (Q.L.).
7. Department of Neurology, Boston University School of Medicine, MA (A.C.).
8. J.P. Kistler Stroke Research Center, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston (A.C., A.D.W., E.M.G., A.V., S.M.G., J.R., J.N.G.).
9. Neurology Department, University Hospital of Tours, CEDEX 09, France (M.P.).
10. Department of Neuroradiology, Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Germany (F.S.).
11. Division of Neurology, McMaster University and Population Health Research Institute, Hamilton, ON, Canada (A.S., A.H.K.).
12. U.C. Malattie Cerebrovascolari e Stroke Unit, IRCCS Fondazione Mondino, Pavia, Italia (F.M., A.C.).
13. Department of Biomedical Experimental and Clinical, Neuroradiology, University of Firenze, AOU Careggi, Firenze, Italy (G.B., E.F.).
14. Stroke Unit, AOU Careggi, Firenze, Italia (F.A.).
15. IRCCS Istituto delle Scienze Neurologiche di Bologna,UOC Neurologia e Rete Stroke Metropolitana, Ospedale Maggiore, Bologna, Italia (L.B., S.G., A.Z.).
16. IRCCS Istituto delle Scienze Neurologiche di Bologna, Unità di Neuroradiologia, Ospedale Maggiore, Bologna, Italia (L.S.).
17. Clinica Neurologica, Dipartimento di Scienze Biomediche e Chirurgico Specialistiche, Università degli studi di Ferrara, Ospedale Universitario S. Anna, Ferrara, Italia (M.L., I.C.).
18. Department of Clinical and Experimental Sciences, Neurology Unit, University of Brescia, Italy (A.P.).
19. Division of Neurocritical Care and Emergency Neurology, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston (J.R.).
20. Henry and Allison McCance Center for Brain Health, Massachusetts General Hospital, Boston (J.R., J.N.G.).
21. Department of Emergency Medicine, Massachusetts General Hospital, Boston (J.N.G.).