1. Trachoma Control Program, The Carter Center, Atlanta, Georgia;
2. Trachoma Control Program, The Carter Center, Addis Ababa, Ethiopia;
3. Centers for Disease Control and Prevention, DPD, Atlanta, Georgia;
4. Amhara Public Health Institute, Research and Technology Transfer Directorate, Bahir Dar, Ethiopia;
5. Department of Ophthalmology, University of California San Francisco, San Francisco, California
6. Francis I. Proctor Foundation, University of California San Francisco, San Francisco, California;