1. Department of Ophthalmology, Oregon Health and Science University, Portland2Department of Ophthalmology, University of California, San Francisco
2. Department of Ophthalmology, University of California, San Francisco
3. Department of Ophthalmology, University of California, San Francisco3Division of Preventive Medicine and Public Health, Department of Epidemiology and Biostatistics, University of California, San Francisco4Francis I. Proctor Foundation, University of Cali
4. Department of Ophthalmology, University of California, San Francisco4Francis I. Proctor Foundation, University of California, San Francisco5Department of Ophthalmology, San Francisco VA Medical Center, San Francisco, California
5. Department of Ophthalmology, University of California, San Francisco5Department of Ophthalmology, San Francisco VA Medical Center, San Francisco, California