1. From The Ohio State University College of Optometry, Columbus, Ohio;
2. The Ohio State University College of Medicine and Public Health, Division of Epidemiology and Biometrics, Columbus, Ohio; the
3. Southern California College of Optometry, Fullerton, California; the
4. School of Optometry, University of Alabama at Birmingham, Birmingham, Alabama; the
5. University of Houston College of Optometry, Houston, Texas; and the
6. University of Arizona Department of Ophthalmology, Tucson, Arizona.