1. Department of Ophthalmology, Penn State College of Medicine, Hershey, Pennsylvania2Department of Public Health Sciences, Penn State College of Medicine, Hershey, Pennsylvania
2. The Emmes Corporation, Rockville, Maryland
3. Doheny Eye Institute, University of California–Los Angeles
4. Fundus Photograph Reading Center, University of Wisconsin, Madison
5. Charlotte Eye Ear Nose & Throat Associated PA, Charlotte, North Carolina
6. Retina Northwest PC, Portland, Oregon
7. Center for Retina and Macular Disease, Winter Haven, Florida