1. Life Course Epidemiology and Biostatistics Section, University College London Great Ormond Street Institute of Child Health, London, England
2. Ulverscroft Vision Research Group, London, England
3. National Institute for Health Research Biomedical Research Centre at Moorfields Eye Hospital National Health Service Foundation Trust and University College London Institute of Ophthalmology, London, England
4. Great Ormond Street Hospital for Children National Health Service Foundation Trust, London, England
5. Glaucoma Service, Moorfields Eye Hospital National Health Service Foundation Trust, London, England
6. Clinical Epidemiology, Nutrition and Biostatistics Section, National Health Service Great Ormond Street Institute of Child Health, London, England