1. NIHR Biomedical Research Centre, Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology, London, United Kingdom
2. Department of Ophthalmology, University of Calgary, Calgary, Alberta, Canada
3. MRC Epidemiology Unit, University of Cambridge, Cambridge, United Kingdom
4. UCL Institute of Cardiovascular Science, University College London, London, United Kingdom
5. Department of Ophthalmology, St Thomas’ Hospital, King's College London, London, United Kingdom
6. Department of Twin Research & Genetic Epidemiology, St Thomas’ Hospital, King's College London, London, United Kingdom