1. Cancer Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892, USA.
2. Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA 90095, USA.
3. Genome Technology Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892, USA.
4. Affymetrix Corporation, 3420 Central Expressway, Santa Clara, CA 95051, USA.
5. The WALTHAM Centre for Pet Nutrition, Waltham on the Wolds, Leicestershire LE14 4RT, UK.
6. Division of Cardiovascular Medicine, Oregon Health and Science University, Portland, OR 97239, USA.
7. Baker Institute for Animal Health, Cornell University, Ithaca, NY 14853, USA.
8. College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
9. Comparative Orthopaedic Laboratory, University of Missouri, Columbia, MO 65211, USA.
10. Department of Biological Statistics and Computational Biology, Cornell University, Ithaca, NY, USA.