1. Ophthalmology and Eye Health Programs, Department of Health Services, Los Angeles County, Los Angeles, California
2. Department of Medicine, David Geffen School of Medicine, UCLA (University of California, Los Angeles)3Department of Health Policy and Management, UCLA Fielding School of Public Health, University of California, Los Angeles
3. Charles R. Drew University of Medicine and Science, Los Angeles, California
4. Department of Medicine, David Geffen School of Medicine, UCLA (University of California, Los Angeles)