| Affiliation: | (1) Department of Neurology, Asahi General Hospital, I-1326,Asahi-city Chiba 289–2511, Japan;(2) Present address: Department of Neurology and Neurological Science, Graduate School of Medicine, Tokyo Medical and Dental University, 1-5-45,Yushima, Bunkyo-ku Tokyo 113-8519, Japan |
