1. From the Departments of Epidemiology and Biostatistics and
2. From the Departments of Epidemiology and Biostatistics and2Ophthalmology, Erasmus Medical Center, Rotterdam, The Netherlands; the
3. Department of Ophthalmology, University of Wisconsin-Madison, Madison, Wisconsin;
4. From the Departments of Epidemiology and Biostatistics and4The Netherlands Ophthalmic Research Institute, KNAW, Amsterdam, The Netherlands; and the5Department of Ophthalmology, Academic Medical Center, Amsterdam, The Netherlands.