1. Shiley Eye Institute, Department of Ophthalmology, University of California, San Diego, La Jolla
2. Department of Ophthalmology, Federal University of São Paulo, São Paulo, Brazil
3. School of Medicine, University of Alabama, Birmingham
4. Edward S. Harkness Eye Institute, Columbia University Medical Center, New York, New York
5. Duke Eye Center, Department of Ophthalmology, Duke University, Durham, North Carolina