1. The National Eye Health Programme, Ministry of Health, Banjul, Kanifing, The Gambia
2. Sheikh Zayed Regional Eye Care Center, Banjul, Kanifing, The Gambia
3. Department of Ophthalmology, University of Jos, Jos, Nigeria
4. Sightsavers Nigeria Country Office, Kaduna, Nigeria
5. Clinical Research Department, London School of Hygiene & Tropical Medicine, London, UK
6. International Trachoma Initiative, Task Force for Global Health, Atlanta, Georgia, USA
7. Sightsavers International, Sightsavers, Haywards Heath, UK
8. Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland
9. Sightsavers, Banjul, The Gambia