1. Department of Radiology (Y.L., Y.Y., J.O., B.J., S.O., G.Z.)
2. Department of Electrical Engineering (J.O.), Stanford University, CA.
3. National Heart and Lung Institute, Imperial College London, United Kingdom (G.Y.).
4. Department of Neuroradiology, University of Texas MD Anderson Center, Houston (M.W.).
5. Neurology Service, Department of Clinical Neurosciences, Lausanne University Hospital and University of Lausanne, Switzerland (P.M.).
6. Department of Neurology, UCLA, CA (D.S.L.).
7. Department of Neurology, Stanford University, Stanford, CA (M.G.L., G.W.A.).