1. National Program for the Prevention of Blindness, Ministry of Health, Asmara, Eritrea
2. Task Force for Global Health, Decatur, GA, USA
3. Clinical Services, Ministry of Health, Asmara, Eritrea
4. The Fred Hollows Foundation, Sydney, Australia
5. Department of Ophthalmology, University of Jos, Jos, Nigeria
6. Sightsavers, Kaduna, Nigeria
7. Kilimanjaro Centre for Community Ophthalmology, Division of Ophthalmology, University of Cape Town, Cape Town, South Africa
8. Department of Ophthalmology, College of Medicine, University of Sana’a, Sana’a, Yemen
9. Prevention of Blindness Program, Ministry of Public Health & Population, Sana’a, Yemen
10. Eye Unit, Al-Thawra Hospital, Sana’a, Yemen
11. Clinical Research Department, London School of Hygiene & Tropical Medicine, London, UK
12. London Centre for Neglected Tropical Diseases Research, London, UK
13. Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland