[1] Stanford Univ, Sch Med, Ophthalmol, Menlo Pk, CA USA
[2] Bascom Palmer Eye Inst, Ophthalmol, Miami, FL 33136 USA
[3] Carl Zeiss Meditec, Dublin, CA USA
[4] Bascom Palmer, Biostat, Miami, FL USA
[5] Bascom Palmer Eye Inst, Ophthal Epidemiol & Publ Hlth, Miami, FL 33136 USA