1. Department of Neurology Beijing Tiantan Hospital, Capital Medical University; China National Clinical Research Center for Neurological Diseases 119 South Fourth Ring West Road, Fengtai District Beijing 100070 PR. China
2. Department of Neurology Xuanwu Hospital of Capital Medical University 45 Chang Chun Road, Xicheng District Beijing 100053 PR. China
3. Department of Neurology the Second Hospital of Hebei Medical University, Hebei Medical University 215 Heping West Road, Xinhua District Hebei 050000 Shijiazhuang PR. China
4. Department of Neurology Peking Union Medical College Hospital Chinese Academy of Medical Sciences and Peking Union Medical College 1 Shuaifuyuan, Dongcheng District Beijing 100730 PR. China