1. Nottingham University Hospital; Ophthalmology; Derby Road Nottingham UK NG7 2UH
2. London School of Hygiene & Tropical Medicine; Cochrane Eyes and Vision, ICEH; Keppel Street London UK WC1E 7HT
3. Moorfields Eye Hospital NHS Foundation Trust; Glaucoma Service; 162 City Road London UK EC1V 2PD
4. Moorfields Eye Hospital NHS Foundation Trust; 162 City Road London UK
5. University of Nottingham; School of Medicine; Nottingham UK NG7 2UH
6. Queen's University Belfast; Centre for Public Health; Grosvenor Road Belfast UK BT12 6BA