1. Nuffield Laboratory of Ophthalmology, University of Oxford, UK
2. Oxford Eye Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
3. Vision and Eye Research Institute, School of Medicine, Anglia Ruskin University, Cambridge, UK
4. Department of Ophthalmology, University Hospital of Bonn, Bonn, Germany
5. Department of Ophthalmology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
6. Institute of Ophthalmology, University College London, London, UK
7. Moorfields Eye Hospital, London, UK