1. Cornea Image Analysis Reading Center, Department of Ophthalmology and Visual Sciences, University Hospitals Eye Institute, Case Western Reserve University, Cleveland, Ohio
2. Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota
3. Jaeb Center for Health Research, Tampa, Florida
4. Center for Preventive Ophthalmology and Biostatistics, Perelman School of Medicine, University of Pennsylvania, Philadelphia
5. The Wilmer Eye Institute, Johns Hopkins University, Baltimore, Maryland
6. University of Iowa Hospitals and Clinics, Iowa City
7. Sadeer Hannush, P. C., Langhorne, Pennsylvania
8. Eye Consultants of Atlanta, Atlanta, Georgia
9. The Ohio State University Wexner Medical Center-Havener Eye Institute, Columbus
10. Moran Eye Center, University of Utah, Salt Lake City
11. Ophthalmic Consultants of Boston, Boston, Massachusetts
12. University of California, San Francisco
13. Cornea Consultants of Albany, Slingerlands, New York
14. Iowa Lions Eye Bank, Iowa City
15. Kellogg Eye Center, University of Michigan, Ann Arbor
16. Devers Eye Institute, Portland, Oregon
17. Verdier Eye Center, Grand Rapids, Michigan