1. From the Department of Neurology, Tohoku University School of Medicine, Sendai (K.A., M.A., J.K., Y.I.), and the Departments of Pathology at Mie University School of Medicine, Tsu (T.Y), Sapporo Medical College, Sapporo (A.H.), and the Institute of Neuropathology, Kumagaya (K.K.), Japan.