1. School of Life Sciences and Biomedical Center, Sun Yat-Sen University, Guangzhou, China
2. Multiple Sclerosis Centre, Department of Neurology, Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
3. Departments of Pediatrics and Microbiology and Immunology, Georgetown University Medical Center, Washington, DC, USA
4. Department of Medicine, Penn State Health Milton S. Hershey Medical Center, Hershey, PA, USA