1. Department of Ophthalmology, University of Parakou, Parakou, Benin
2. Programme National de Lutte contre les Maladies Transmissibles, Ministère De La Santé, Cotonou, Benin
3. Clinical Research Department, London School of Hygiene & Tropical Medicine, London, UK
4. Global Neglected Tropical Diseases Programme, World Health Organization, Geneva, Switzerland
5. International Trachoma Initiative, Task Force for Global Health, Atlanta, Georgia, USA
6. Sightsavers International, Haywards Heath, UK
7. Global Health Division, RTI International, Atlanta, Georgia, USA
8. FHI360, Washington DC, USA