1 From the Department of Paediatric Neurology (Y.H.), Great Ormond Street Hospital for Children; Department of Neuroinflammation (Y.H.), Queen Square MS Centre, UCL Institute of Neurology, London, UK; Department of Neurology and Neurological Sciences (C.B.P.), Stanford University School of Medicine, Palo Alto, CA; and MS Centre ErasMS, Department of Neurology (R.H.), Erasmus MC, Rotterdam, the Netherlands. yael@doctors.net.uk.
2 From the Department of Paediatric Neurology (Y.H.), Great Ormond Street Hospital for Children; Department of Neuroinflammation (Y.H.), Queen Square MS Centre, UCL Institute of Neurology, London, UK; Department of Neurology and Neurological Sciences (C.B.P.), Stanford University School of Medicine, Palo Alto, CA; and MS Centre ErasMS, Department of Neurology (R.H.), Erasmus MC, Rotterdam, the Netherlands.