1. University Hospitals Birmingham NHS Foundation Trust
2. Birmingham and Midland Eye Centre, Sandwell and West Birmingham NHS Trust
3. Centre for Health and Social Care Improvement, School of Health and Wellbeing, University of Wolverhampton, Wolverhampton
4. National Institute for Health Research Biomedical Research Centre, UCL Partners/Moorfields Eye Hospital NHS Foundation Trust
5. UCL Institute of Ophthalmology, London, UK
6. Department of Primary Clinical Care Sciences, University of Birmingham, Birmingham