1. Department of Medicine, University College London Hospital, London, UK
2. Ophthalmology Department, University Hospitals Sussex NHS Foundation Trust, Sussex, UK
3. Population, Policy and Practice Programme, UCL GOS Institute of Child Health, London, UK
4. UCL Institute of Ophthalmology, London, UK
5. School of Cellular and Molecular Medicine, Bristol University, Bristol, UK
6. Ophthalmology and Rheumatology Departments, National Institute for Health Research Biomedical Research Centre at UCL Great Ormond Street Institute of Child Health and Great Ormond Street Hospital, London, UK
7. Great Ormond Street Hospital for Children NHS Trust, London, UK