1. From the Department of Community Medicine, West Virginia University School of Medicine, Morgantown, West Virginia; 2Singapore Eye Research Institute and
2. Centre for Vision Research, Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia; 4Centre for Eye Research Australia, University of Melbourne, Melbourne, Australia.
3. Centre for Vision Research, Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia;
4. Departments of Medicine,
5. Singapore Eye Research Institute and 6Ophthalmology, and
6. Singapore Eye Research Institute and 7Epidemiology and Public Health, Yong Loo Lin School of Medicine, National University of Singapore, Yong Loo Lin School of Medicine, National University of Singapore, Singapore;
7. Singapore Eye Research Institute and 6Ophthalmology, and 4Centre for Eye Research Australia, University of Melbourne, Melbourne, Australia.