1. 1Trachoma Control Program, The Carter Center, Addis Ababa, Ethiopia;
2. 2Trachoma Control Program, The Carter Center, Atlanta, Georgia;
3. 3Amhara Public Health Institute, Research and Technology Transfer Directorate, Bahir Dar, Ethiopia;
4. 4Amhara Regional Health Bureau, Health Promotion and Disease Prevention, Bahir Dar, Ethiopia;
5. 5Federal Ministry of Health, Disease Prevention and Control Directorate, Addis Ababa, Ethiopia;
6. 6RTI International, International Development (Global Health), London, United Kingdom