1. From the Singapore Eye Research Institute, Republic of Singapore; the2Department of Community, Occupational and Family Medicine, National University of Singapore, Republic of Singapore;
2. The Institute of Ophthalmology, London, United Kingdom; the
3. Singapore National Eye Center, Republic of Singapore; the
4. From the Singapore Eye Research Institute, Republic of Singapore; the5Department of Ophthalmology, National University Hospital, Republic of Singapore; the
5. University of Sydney, Center for Vision Research, Westmead Millennium Institute, Westmead, New South Wales, Australia; and the
6. From the Singapore Eye Research Institute, Republic of Singapore; the4Singapore National Eye Center, Republic of Singapore; the
7. From the Singapore Eye Research Institute, Republic of Singapore; the7Center for Eye Research Australia, University of Melbourne, Melbourne, Australia.