1 Department of Ophthalmology and Visual Sciences, University of Michigan Medical School, Ann Arbor, MI.
2 Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI.
3 Department of Internal Medicine, Division of Metabolism, Endocrinology, and Diabetes, University of Michigan Medical School, Ann Arbor, MI.
4 Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, University Station Clinic, Madison, WI.
5 Wayne State University School of Medicine, Detroit, MI.