1. Department of Neurology Zhujiang Hospital of Southern Medical University Guangzhou China
2. Department of Neurology General Hospital of Southern Theatre Command of PLA Guangzhou China
3. Department of Neurology 1st People Hospital of Zhaoqing Zhaoqing China
4. Department of Neurology the 2nd Affiliated Hospital of Guangzhou Medical University Guangzhou China
5. Department of Neurology Guangzhou First People's Hospital Guangzhou China
6. Department of Medicine and Therapeutics Faculty of Medicine Gerald Choa Neuroscience Centre Prince of Wales hospital The Chinese University of Hong Kong Hong Kong SAR China
7. Department of Neurology University of North Texas Health Science Center Fort Worth TX USA
8. Department of Neurology San Francisco & the San Francisco Veterans Affairs Medical CenterUniversity of California San Francisco CA USA