1. From the Department of Neurology and Neurological Sciences (K.E.T.), Stanford University School of Medicine, CA; Department of Neurology (L.R.S., L.M.D., C.G.), Memorial Sloan Kettering Cancer Center; Department of Neurology (L.R.S., L.M.D., C.G.), Weill Cornell Medical College; Human Oncology and Pathogenesis Program (S.N.), Memorial Sloan Kettering Cancer Center, New York; and Department of Neurology (A.M.P.O.), Yale School of Medicine, New Haven, CT.