1. From the Departments of Epidemiology and Public Health and
2. From the Departments of Epidemiology and Public Health and 3Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; and the 2Singapore Eye Research Institute and Singapore National Eye Centre, Singapore.
3. the Singapore Eye Research Institute and Singapore National Eye Centre, Singapore.
4. Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; and the 2Singapore Eye Research Institute and Singapore National Eye Centre, Singapore.