1. From the F. I. Proctor Foundation and
2. Aravind Eye Care System, Madurai, India;
3. Aravind Eye Care System, Coimbatore, India;
4. Aravind Eye Care System, Tirunelveli, India; and
5. the Departments of Epidemiology and Biostatistics and
6. the Departments of Surgery (Ophthalmology) and 7Microbiology and Immunology, Dartmouth Medical School, Lebanon, New Hampshire.
7. From the F. I. Proctor Foundation and 8Ophthalmology, University of California, San Francisco, San Francisco, California;
8. From the F. I. Proctor Foundation and the Departments of 5Epidemiology and Biostatistics and 8Ophthalmology, University of California, San Francisco, San Francisco, California;