1. Department of Neurology; The First Affiliated Hospital of Sun Yat-sen University; Guangzhou China
2. Department of Neurology; The First Affiliated Hospital of Guangxi Medical University; Nanning China
3. Department of Neurology; The First Affiliated Hospital of Guangzhou Medical University; Guangzhou China
4. Department of Neurology; The Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
5. Ann Romney Center for Neurologic Disease; Brigham and Women's Hospital, Harvard Medical School; Boston MA USA
6. Department of Neurology; The Second Affiliated Hospital of Xinjiang Medical University; Urumqi China
7. Department of Blood Transfusion; The Fifth Affiliated Hospital, Southern Medical University; Guangzhou China