1. Viet Nam Institute of Ophthalmology, Ministry of Health, Hanoi, Viet Nam
2. RTI International, Dar es Salaam, Tanzania
3. Task Force for Global Health, Decatur, GA, USA
4. FHI 360, Bangkok, Thailand
5. RTI International, Washington, DC, USA
6. United States Agency for International Development, Washington, DC, USA
7. F.I. Proctor Foundation, San Francisco, CA, USA
8. Department of Ophthalmology, San Francisco, CA, USA
9. Department of Epidemiology & Biostatistics, University of California, San Francisco, CA, USA
10. Kilimanjaro Center for Community Ophthalmology, Division of Ophthalmology, University of Cape Town, Cape Town, South Africa
11. Clinical Research Department, London School of Hygiene & Tropical Medicine, London, UK
12. London Centre for Neglected Tropical Disease Research, London, UK