1. Neglected Tropical Diseases, Sightsavers, Conakry, Guinea
2. Ministère de la Santé, National Programme for the Control of Neglected Tropical Diseases, Conakry, Guinea
3. Kilimanjaro Centre for Community Ophthalmology, Division of Ophthalmology, University of Cape Town, Cape Town, South Africa
4. Clinical Research Department, London School of Hygiene & Tropical Medicine, London, UK
5. Neglected Tropical Diseases, RTI International, Washington, District of Columbia, USA
6. Neglected Tropical Diseases, Sightsavers, Haywards Heath, UK
7. International Trachoma Initiative, Task Force for Global Health, Atlanta, Georgia, USA
8. Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland