1. Research Center in Minority Institution, and Department of Ophthalmology, Charles R. Drew University of Medicine and Science, Los Angeles, California.
2. Department of Radiology, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California.
3. Division of General Internal Medicine and Health Services Research, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California.
4. Jules Stein Eye Institute, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California.