1. Birmingham & Midland Eye Centre; Sandwell and West Birmingham Hospitals NHS Trust; Birmingham UK
2. Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology; London UK
3. National Institute for Health Research; Biomedical Research Centre; Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology; London UK
4. University Hospitals Birmingham NHS Foundation Trust; Birmingham UK
5. Centre for Health and Social Care Improvement; University of Wolverhampton; Wolverhampton UK