1. Department of Ophthalmology, College of Medicine, University of Florida, Gainesville, FL 32610.
2. Department of Basic Sciences and Pennsylvania College of Optometry, Salus University, Elkins Park, PA 19027.
3. Scheie Eye Institute, University of Pennsylvania, Philadelphia, PA 19104.
4. Department of Neuroscience, College of Medicine, University of Florida, Gainesville, FL 32610.
5. Department of Ophthalmology, College of Medicine, State University of New York (SUNY) Upstate Medical University, Syracuse, NY 13210.
6. Department of Ophthalmology, John A. Moran Eye Center, University of Utah Health Science Center, Salt Lake City, UT 84112.