1. Department of Neurology and Multiple Sclerosis Research Center The Third Affiliated Hospital Sun Yat‐sen University Guangzhou China
2. Department of Neurology Guangzhou Brain Hospital Guangzhou China
3. Department of Neurology Nanfang Hospital Southern Medical University Guangzhou China
4. Department of Biostatistics, Epidemiology and Informatics University of Pennsylvania Philadelphia PA USA
5. Department of Neurology The Fifth Affiliated Hospital Sun Yat‐sen University Zhuhai China
6. Department of Nephrology The Second People's Hospital of Foshan Foshan China