1. Department of Ophthalmology and Visual Sciences, Washington University in St. Louis, St. Louis, Missouri 63110, United States
2. Veterans Affairs Medical Center, St. Louis, Missouri 63106, United States
3. Department of Medicine, Washington University School of Medicine, St. Louis, Missouri 63110, United States
4. Department of Radiology, Washington University School of Medicine, St. Louis, Missouri 63110, United States