Libin Liu1, Mingyu Yin2, Sanxin Liu3, Mengyan Hu3, Bingjun Zhang4. 1. Department of Neurology, Zhuhai Hospital Affiliated with Jinan University, Zhuhai, China; Department of Neurology, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China. 2. Department of Rehabilitation, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China. 3. Department of Neurology, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China. 4. Department of Neurology, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China. Electronic address: bingjunzhang@aliyun.com.