1. Infection, Inflammation and Rheumatology Section, University College London Great Ormond Street Institute of Child Health, London, United Kingdom
2. Paediatric Neurology Department, Children NHS Foundation Trust, University College London Great Ormond Street Institute of Child Health, London, United Kingdom
3. North East Thames Regional Genetics Laboratory, Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom
4. Children’s Neurosciences Unit, Evelina London Children’s Hospital, Women’s and Children’s Department, Faculty of Life Sciences and Medicine, King’s College London, London, United Kingdom
5. Immunology Department, Great Ormond Street Hospital NHS Foundations Trust, London, United Kingdom
6. Paediatric Neuroradiology Department, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
7. Paediatric Neurology Department, Birmingham Children’s Hospital, Birmingham, United Kingdom
8. Paediatric Rheumatology Department, University of Gothenburg, Gothenburg, Sweden
9. Arthritis Research UK Centre for Adolescent Rheumatology, University College London, London, United Kingdom