M-H Chen1, J-T Lee2, G-S Peng2, Y-F Sung2. 1. From the Department of Medicine, Taoyuan Armed Forces General Hospital, No. 168, Zhogxing Rd., Longtan Township, Taoyuan County 32551, Taiwan and Department of Neurology, Tri-Service General Hospital, National Defense Medical Center, No. 325, Sec. 2, Chenhhong Rd., Neihu District, Taipel City 11490, Taiwan. 2. Department of Neurology, Tri-Service General Hospital, National Defense Medical Center, No. 325, Sec. 2, Chenhhong Rd., Neihu District, Taipel City 11490, Taiwan.