[1] Kanto Cent Hosp, Dept Neurol, Setagaya Ku, Tokyo 1588631, Japan
[2] Kanto Cent Hosp, Dept Lab Med & Pathol, Tokyo, Japan
[3] Kanto Cent Hosp, Dept Radiol, Tokyo, Japan
[4] Tokyo Metropolitan Matsuzawa Hosp, Dept Lab Med & Pathol, Tokyo, Japan
[5] Taisho Pharmaceut, Med Res Labs, Omiya, Japan
[6] Hiroshima Univ, Sch Med, Dept Neuropathol, Hiroshima, Japan
[7] Niigata Univ, Inst Brain Res, Dept Pathol, Niigata 95021, Japan