1. David Geffen School of Medicine, University of California, Los Angeles, CA
2. Duke Eye Center, Duke University, Durham, NC
3. Doheny Eye Institute, University of California, Los Angeles, CA
4. Ophthalmology, Sansum Clinic, Santa Barbara, CA
5. Stein Eye Institute, University of California, Los Angeles, CA
6. Olive View, UCLA Medical Center, Sylmar, CA