1. From the Department of Neurology, Neurovascular Imaging Research Core and UCLA Stroke Center, University of California Los Angeles (D.S.L.)
2. Department of Neurology, University of Heidelberg, Germany (E.J.)
3. Department of Neurology, University of Ulm, University and Rehabilitation Hospitals, Ulm, and the Center for Stroke Research Berlin, Germany (E.J.)
4. Biogen, Cambridge, MA (Y.S., A.Y., J.L.)
5. Mission Research Institute, Mission Health System, Asheville, NC (E.C.J.).