1. From the Department of Neurology (D.P.G.-G., H.B., R.L.U., J.R.D., H.C., G.M., K.A.J.), and Department of Psychiatry and Psychology (M.M.M.), Mayo Clinic, Rochester, MN; Department of Neuroscience (Neuropathology) (D.W.D.), Mayo Clinic, Jacksonville, FL; and Department of Radiology (N.T.T.P., J.L.W.), Mayo Clinic, Rochester, MN.