1. (b) Second Department of Neurology, Central Hospital; (a) Department of Neurology, West China Hospital, Sichuan University, Chengdu, China; Handan China
2. Zhong Shan Hospital, Xiamen University; Department of Neurology; No 201 Hubinnanlu Xiamen Fujian China 361004
3. West China Hospital, Sichuan University; Department of Neurology; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
4. West China Hospital, Sichuan University; Chinese Cochrane Centre; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
5. Central Hospital; Second Department of Neurology; No. 15 Zhonghua South Street Handan China 056001