1. Department of Neurology and Neurosurgery, Brain Center Rudolf Magnus, University Medical Center Utrecht, the Netherlands (J.R.S., S.D.S., J.P.J.D., J.T., G.J.E.R., H.B.B.).
2. Henry and Allison McCance Center for Brain Health, Massachusetts General Hospital, Boston (J.R.S., S.D.S., C.K., N.Y., C.D.A., J.R.).
3. Department of Neurology (J.R.S., S.D.S., C.K., N.Y., J.R.), Massachusetts General Hospital, Boston.
4. Center for Genomic Medicine (J.R.S., C.K., N.Y., C.D.A., S.D.S., J.R.), Massachusetts General Hospital, Boston.
5. Broad Institute, Cambridge (J.R.S., S.D.S., J.R.S., C.K., N.Y., C.D.A., J.R.).
6. JPK Stroke Center (S.D.S., M.P., A.V.), Massachusetts General Hospital Stroke Research Center, Harvard Medical School, Boston.
7. University Lille, Inserm, CHU Lille, U1172 – LilNCog – Lille Neuroscience & Cognition, France (M.P., L.P., C.C.).
8. Neurology Department, University Hospital of Tours, INSERM U1253 iBrain, France (M.P.).
9. Department of Neurology, Isala Hospital, Zwolle, the Netherlands (W.M.T.J.).
10. Centre for Clinical Brain Sciences, The University of Edinburgh, United Kingdom (M.A.R., R.A.-S.S.).
11. Department of Neuroradiology, NHS Lothian, United Kingdom (M.A.R.).
12. Department of Neurology, Donders Institute for Brain Cognition & Behavior, Radboud University Medical Center, Nijmegen, the Netherlands (F.H.B.M.S., C.J.M.K.).
13. Department of Neurology and School for Cardiovascular Diseases (CARIM), Maastricht University Medical Center, the Netherlands (J.S.).
14. Department of Neurology, Zuyderland Medical Center, Heerlen, the Netherlands (T.S.).
15. Department of Emergency Medicine (B.N.M., J.N.G.), Massachusetts General Hospital Stroke Research Center, Harvard Medical School, Boston.
16. Department of Neurology, Brigham and Women’s Hospital, Boston (C.D.A.).
17. Department of Neurology, LUMC, Leiden, the Netherlands (M.J.H.W.).
18. Wolfson Centre for Prevention of Stroke and Dementia, Nuffield Department of Clinical Neurosciences, University of Oxford, United Kingdom (P.M.R.).
19. Department of Neurosurgery, Elisabeth-TweeSteden Hospital, Tilburg, the Netherlands (H.B.B.).