[1] Kyushu Univ, Inst Neurol, Grad Sch Med Sci, Fukuoka 812, Japan
[2] Tohoku Univ, Grad Sch Med, Sendai, Miyagi 980, Japan
[3] Novartis Pharma KK, Tokyo, Japan
[4] Mitsubishi Tanabe Pharma Corp, Osaka, Japan
[5] Kyoto Min Iren Cent Hosp, Kyoto, Japan
[6] Inst Neurotherapeut, Kyoto, Japan
[7] Kyoto Univ Hosp, Kyoto 606, Japan