1. From the Departments of Biostatistics,
2. Epidemiology, and2Department of Ophthalmology and Visual Sciences, Medical School, University of Michigan, Ann Arbor, Michigan; and the
3. Department of Ophthalmology, University of Kentucky, Lexington, Kentucky.
4. Department of Ophthalmology and Visual Sciences, Medical School, University of Michigan, Ann Arbor, Michigan; and the
5. Health Behavior and Health Education, School of Public Health, University of Michigan, Ann Arbor, Michigan; the