1. From the Singapore Eye Research Institute, Singapore National Eye Centre, Singapore;
2. From the Singapore Eye Research Institute, Singapore National Eye Centre, Singapore; the 2Centre for Eye Research Australia, University of Melbourne, Melbourne, Australia;
3. the Department of Endocrinology, Singapore General Hospital, Singapore;
4. the Centre for Vision Research, University of Sydney, Sydney, Australia; and
5. the Centre for Eye Research Australia, University of Melbourne, Melbourne, Australia; the 4Centre for Vision Research, University of Sydney, Sydney, Australia; and
6. the Department of Community, Occupational and Family Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.