1. Neuroimmunological Diseases Unit National Institute of Neurological Disorders and Stroke National Institutes of Health Bethesda Maryland
2. Wellcome Trust‐MRC Cambridge Stem Cell Institute University of Cambridge Cambridge CB2 0AH United Kingdom
3. Department of Clinical Neurosciences University of Cambridge Cambridge CB2 0AH United Kingdom
4. National Institute of Neurological Disorders and Stroke National Institutes of Health Bethesda Maryland