1. Department of Paediatric Neurology; Great Ormond Street Hospital for Children; London UK
2. The Clinical and Academic Department of Ophthalmology; Department of Paediatric Ophthalmology; Great Ormond Street Hospital for Children; London UK
3. Department of Paediatric Neurology; Birmingham Children's Hospital; Birmingham UK
4. Department of Neuroinflammation; Queen Square MS Centre; UCL Institute of Neurology; London UK
5. National Institute for Health Research; UCL Hospitals; Biomedical Research Centre; London UK
6. Children's Neurosciences; Evelina London Children's Hospital at Guy's and St Thomas' NHS Foundation Trust; King's Health Partners Academic Health Science Centre; London UK
7. Faculty of Life Sciences and Medicine; Kings College London; London UK