1. From the James A. Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York; the
2. Department of Ophthalmology, Cole Eye Institute, Cleveland, Ohio;
3. The Rockefeller University, New York, New York; the
4. Cancer Genetics Branch, NHGRI, National Institutes of Health, Bethesda, Maryland; and the
5. School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.