1. From the Indiana University School of Optometry, Bloomington, Indiana; the
2. Francis I. Proctor Foundation, University of California-San Francisco, San Francisco, California; the
3. Department of Ophthalmology, HealthPartners Medical Group and HealthPartners Research Foundation, Minneapolis, Minnesota; the4Department of Ophthalmology, University of Minnesota, Minneapolis, Minnesota; and the
4. School of Optometry, University of Waterloo, Waterloo, Ontario, Canada.