1. Department of Neurology, Foshan Hospital of Traditional Chinese Medicine, Guangzhou University of Chinese Medicine, Foshan, Guangdong 528000, P.R. China
2. Department of Neurology, Yunnan Provincial Hospital of Traditional Chinese Medical, Kunming, Yunnan 650000, P.R. China
3. Department of Neurology, Nan Fang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China