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