[1] Department of Neurology,
[2] Juntendo University School of Medicine,undefined
[3] 2-1-1 Hongo,undefined
[4] Bunkyo,undefined
[5] Tokyo 113-8421,undefined
[6] Japan,undefined
[7] Tel.: +81-3/38 13-31 11,undefined
[8] Fax: +81-3/56 84-04 76,undefined
[9] E-mail: h_miwa@med.juntendo.ac.jp,undefined