1. Retina Foundation of the Southwest, Dallas, Texas, United States 2Department of Ophthalmology, University of Texas Southwestern Medical Center, Dallas, Texas, United States
2. Department of Vision Sciences, University of Alabama at Birmingham, Birmingham, Alabama, United States
3. Department of Biostatistics and Bioinformatics, Emory University, Atlanta, Georgia, United States
4. Department of Ophthalmology, Emory University, Atlanta, Georgia, United States