1. Faculty of Medicine; Imperial College London; London UK
2. Moorfields Eye Hospital NHS Foundation Trust; London UK
3. Suite 22; The Galway Clinic; Galway Ireland
4. International Centre for Eye Health; London School of Hygiene & Tropical Medicine; London UK
5. Cochrane Eyes and Vision; Queen's University Belfast; Belfast UK
6. Ophthalmology Department; St James's University Hospital; Leeds UK
7. NIHR Biomedical Research Centre at Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology; London UK