1. From the F. I. Proctor Foundation, the
2. From the F. I. Proctor Foundation, the2Departments of Laboratory Medicine,
3. Departments of Laboratory Medicine,
4. ORBIS International, Addis Ababa, Ethiopia.
5. From the F. I. Proctor Foundation, the4Ophthalmology, and
6. From the F. I. Proctor Foundation, the4Ophthalmology, and5Epidemiology and Biostatistics, and the6Institute for Global Health, University of California San Francisco, San Francisco, California; and