1. Department of Optometry and Vision Science, University of Alabama at Birmingham, Birmingham, AL 35294, USA
2. Center for Hereditary Retinal Degenerations, Scheie Eye Institute, Department of Ophthalmology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
3. Departments of Ophthalmology and Biochemistry, and Neuroscience Graduate Program, Jacobs School of Medicine and Biomedical Sciences, State University of New York—University at Buffalo, Buffalo, NY 14203, USA
4. Research Service, VA Western NY Healthcare System, Buffalo, NY 14215, USA
5. Vision Science Research Center, School of Optometry, University of Alabama at Birmingham, Birmingham, AL 35294, USA