1. Department of Neurology, Leiden University Medical Center, the Netherlands (E.A.K., I.R., S.V., G.M.T., M.J.H.W.).
2. Henry and Allison McCance Center for Brain Health, Massachusetts General Hospital, Harvard Medical School, Boston (J.P.C., J.R.A., J.R., A.B.).
3. Department of Neurology, J Philip Kistler Stroke Research Center, Massachusetts General Hospital, Harvard Medical School, Boston (J.P.C., J.R.A., V.P., M.E.G., J.R., S.M.G., A.B., A.V.).
4. Department of Neurology, University of Miami Miller School of Medicine, FL (J.P.C.).
5. Department of Radiology, Leiden University Medical Center, the Netherlands (S.V., T.W.v.H., M.A.A.v.W.).
6. Department of Neurology, Otto-von-Guericke University, Magdeburg, Germany (V.P.).
7. Department of Biomedical Data Sciences, Leiden University Medical Center, the Netherlands (E.W.v.Z.).