1. Department of Vision Sciences, School of Optometry, University of Alabama at Birmingham, Birmingham, Alabama, United States
2. Department of Ophthalmology and Visual Sciences, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States
3. Rice University, Houston, Texas, United States
4. Boston University School of Medicine, Boston, Massachusetts, United States
5. University of Nebraska Medical Center, Omaha, Nebraska, United States
6. The University of Texas M.D. Anderson Cancer Center, Houston, Texas, United States