1 School of Medical Sciences, Brain and Mind Centre, University of Sydney, Australia; Department of Neurology, Washington University School of Medicine, United States. Electronic address: laura.piccio@sydney.edu.au.
2 Department of Neurology and Department of Pathology and Immunology, Washington University School of Medicine, United States; ISN-15 Multiple Sclerosis Center of Excellence US Department of Veterans Affairs, Unites States. Electronic address: gfwu@wustl.edu.
3 Center for Neuroimmunology & Neuroinfectious Diseases, Departments of Medicine, Pathology & Immunology, Neurosciences, Washington University School of Medicine, United States. Electronic address: rklein@wustl.edu.