1. Department of Ophthalmology, University of Washington, Seattle
2. Department of Cornea and Refractive Surgery, Aravind Eye Care System, Madurai, India
3. Department of Ophthalmology, University of California, San Francisco, San Francisco
4. Francis I. Proctor Foundation, University of California, San Francisco, San Francisco
5. Department of Epidemiology & Biostatistics, University of California, San Francisco, San Francisco
6. Institute for Global Health, University of California, San Francisco, San Francisco