1. Department of Ophthalmology, University of California, San Francisco, San Francisco, California 2School of Optometry, University of California, Berkeley, Berkeley, California
2. Department of Ophthalmology, Medical College of Wisconsin, Milwaukee, Wisconsin
3. Department of Ophthalmology, University of California, San Francisco, San Francisco, California 6The Francis I. Proctor Foundation for Research in Ophthalmology, University of California, San Francisco, San Francisco, California 7Division of Preventive Me
4. Department of Ophthalmology, University of California, San Francisco, San Francisco, California
5. School of Optometry, University of California, Berkeley, Berkeley, California