1. University of Iowa, Iowa City
2. University of Rochester School of Medicine & Dentistry, Rochester, New York
3. University of Mississippi Medical Center, Jackson
4. University of Rochester Eye Institute, Rochester, New York
5. University of Texas Southwestern Medical Center, Dallas
6. Bethesda Neurology LLC, Bethesda, Maryland
7. University of California, Davis Medical Center
8. National Eye Institute, Bethesda, Maryland
9. Roosevelt Hospital, New York, New York