1. From the Singapore National Eye Centre and Singapore Eye Research Institute, Singapore; the
2. From the Singapore National Eye Centre and Singapore Eye Research Institute, Singapore; the2Department of Epidemiology, Institute of Ophthalmology, London, United Kingdom; the
3. Defence Medical and Environmental Research Institute, Singapore;4Tan Tock Seng Hospital, Eye Institute, National Healthcare Group, Singapore; and the
4. From the Singapore National Eye Centre and Singapore Eye Research Institute, Singapore; the3Defence Medical and Environmental Research Institute, Singapore;5Department of Ophthalmology, National University of Singapore, Singapore.