1. From the International Centre for Eye Health, London School of Hygiene and Tropical Medicine, London, United Kingdom; the 2MRC (Medical Research Council) Centre of Epidemiology for Child Health and
2. From the International Centre for Eye Health, London School of Hygiene and Tropical Medicine, London, United Kingdom;
3. the Developmental Biology Unit, Institute of Child Health, UCL (University College London), London, United Kingdom; the 3Ulverscroft Vision Research Group, Institute of Child Health and Great Ormond Street Hospital for Children, National Health Service (N
4. Moorfields Eye Hospital, London, United Kingdom; the 6Department of Physiology, Anatomy, and Genetics, University of Oxford, Oxford, United Kingdom; and the 7Birmingham Children's Hospital NHS Foundation Trust, Birmingham, United Kingdom.
5. the Developmental Biology Unit, Institute of Child Health, UCL (University College London), London, United Kingdom;
6. the MRC (Medical Research Council) Centre of Epidemiology for Child Health and the 4Developmental Biology Unit, Institute of Child Health, UCL (University College London), London, United Kingdom;