1. From the Centre for Eye Research Australia, University of Melbourne, Melbourne, Victoria, Australia; the2Singapore Eye Research Institute, National University of Singapore, Singapore; the
2. Graduate Studies Program in Epidemiology, School of Medicine, Federal University of Rio Grande do Sul, Porto Alegre, Brazil; the
3. Departments of Medicine and5Epidemiology, the Johns Hopkins University, Baltimore, Maryland; the
4. Department of Ophthalmology, University of Wisconsin, Madison, Wisconsin; and the
5. Department of Biostatistics, University of North Carolina, Chapel Hill, North Carolina.
6. Epidemiology, the Johns Hopkins University, Baltimore, Maryland; the