1. Prevention of Blindness Program, Ministry of Public Health & Population, Sana’a, Yemen
2. Neglected Tropical Diseases Directorate Ministry of Public Health & Population, Sana’a, Yemen
3. Clinical Research Department, London School of Hygiene & Tropical Medicine, London, UK
4. Parasitology Department, Sana'a University, Sana’a, Yemen
5. Sightsavers, Haywards Heath, UK
6. Sightsavers, Addis Ababa, Ethiopia
7. Task Force for Global Health, Decatur, Georgia, USA
8. Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland
9. Ophthalmology Department, Sana’a University, Sana’a, Yemen
10. Taskforce for Trachoma Control Program, Ministry of Public Health & Population, Sana’a, Yemen