Y-W Pai1, C-H Lin2, I-T Lee3, M-H Chang4. 1. Neurological Institute, Taichung Veterans General Hospital, No. 1650, Taiwan Boulevard, Sec. 4, 40705 Taichung City, Taiwan. 2. Department of Medical Research, Taichung Veterans General Hospital, No. 1650, Taiwan Boulevard, Sec. 4, 40705 Taichung City, Taiwan. 3. Division of Endocrinology and Metabolism, Department of Internal Medicine, Taichung Veterans General Hospital, No. 1650, Taiwan Boulevard, Sec. 4, 40705 Taichung City, Taiwan; Department of Medicine, School of Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong Street, 112 Taipei City, Taiwan; Department of Medicine, School of Medicine, Chung Shan Medical University, No. 110, Sec. 1, Jianguo N. Rd., 40201 Taichung City, Taiwan. 4. Neurological Institute, Taichung Veterans General Hospital, No. 1650, Taiwan Boulevard, Sec. 4, 40705 Taichung City, Taiwan; Department of Neurology, School of Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong Street, 112 Taipei City, Taiwan. Electronic address: cmh50@ms10.hinet.net.