1. Department of Clinical Medicine, North Sichuan Medical College, Nanchong, Sichuan, China
2. Department of Neurology, the Third People’s Hospital of Chengdu, Chengdu, Sichuan, China
3. Department of Neurology, the People’s Hospital of Mianyang, Mianyang, Sichuan, China
4. Department of Neurology, the Sixth People’s Hospital of Chengdu, Chengdu, Sichuan, China
5. Medical College of Southwest Jiaotong University, Chengdu, Sichuan, China