1. Department of Ophthalmology, Federal Medical Centre, Makurdi, Nigeria
2. Department of Ophthalmology, University of Jos, Jos, Nigeria
3. Sightsavers, Kaduna, Nigeria
4. Kilimanjaro Centre for Community Ophthalmology International, Division of Ophthalmology, University of Cape Town, Cape Town, South Africa
5. Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland
6. Department of Public Health, the Environment and Social Determinants of Health, World Health Organization, Geneva, Switzerland
7. International Trachoma Initiative, Task Force for Global Health, Decatur, GA, USA
8. Ophthalmology Unit, Surgery Department, Usmanu Danfodiyo University, Sokoto, Nigeria
9. National Eye Centre, Kaduna, Nigeria
10. Federal Ministry of Health, Abuja, Nigeria
11. Ministry of Health, Lokoja, Kogi State, Nigeria
12. Clinical Research Department, London School of Hygiene & Tropical Medicine, London, United Kingdom
13. London Centre for Neglected Tropical Disease Research, London, United Kingdom