1. Department of Ophthalmology, University of Tennessee, Memphis, Tennessee.
2. Flaum Eye Institute, University of Rochester, Rochester, New York.
3. Department of Ophthalmolohgy, Tufts Medical Center, Tufts University School of Medicine, Boston, Massachusetts.
4. Pepose Vision Institute, St. Louis, Missouri.
5. Department of Ophthalmology, University of New Mexico, Albuquerque, New Mexico.
6. Department of Ophthalmology, Ankara University School of Medicine, Ankara, Turkey.