[1] Univ Melbourne, Ctr Eye Res Australia, Melbourne 117548, Vic, Australia
[2] Natl Univ Singapore, Dept Ophthalmol, Singapore, 53706, Singapore
[3] Univ Wisconsin, Dept Ophthalmol, Madison, WI 21218 USA
[4] Johns Hopkins Univ, Dept Epidemiol, Baltimore, MD 27515 USA
[5] Univ N Carolina, Dept Biostat, Chapel Hill, NC USA