1. Saint Joseph Hospital, Kinshasa, Democratic Republic of the Congo
2. Neglected Tropical Diseases Unit, Ministère de la Santé Publique, Kinshasa, Democratic Republic of the Congo
3. RTI International, Kinshasa, Democratic Republic of the Congo
4. World Vision International, Kinshasa, Democratic Republic of the Congo
5. Christian Blind Mission, Kinshasa, Democratic Republic of the Congo
6. RTI International, Washington, DC, USA
7. Task Force for Global Health, Decatur, GA, USA
8. Ministry of Health, Parakou, Benin
9. Ministry of Health, Niamey, Niger
10. RTI International, Dar es Salaam, Tanzania
11. Clinical Research Department, London School of Hygiene & Tropical Medicine, London, UK
12. Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland