1. Diagnostic Center for Population and Animal Health, College of Veterinary Medicine, Michigan State University, Lansing, Michigan
2. Molecular Pathology, Unit, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
3. Amgen, Inc, Seattle, Washington
4. Yager-Best Histovet, Guelph, Ontario, Canada
5. The author is deceased
6. Animal Health Laboratory, University of Guelph, Guelph, Ontario, Canada
7. Charles River Laboratories, Pathology Associates, Illinois
8. Antech Diagnostics, Lake Success, New York
9. Department of Infectious Diseases and Pathology, College of Veterinary Medicine, University of Florida, Gainesville, Florida
10. Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
11. Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, Georgia
12. Department of Discovery Toxicology, Bristol-Myers Squibb Company, Princeton, New Jersey
13. Department of Comparative Pathobiology, School of Veterinary Medicine, Purdue University, West Lafayette, Indiana
14. Department of Veterinary Pathology, Armed Forces Institute of Pathology, Washington, DC
15. Department of Pathobiology, Faculty of Veterinary Medicine, University of Utrecht, Utrecht, Netherlands
16. Charles River Laboratories Preclinical Services Montreal Inc, Senneville, Quebec, Canada
17. Wyoming State Veterinary Laboratory, Department of Veterinary Sciences, University of Wyoming, Laramie, Wyoming
18. Bridge Pathology Ltd, Bristol, UK
19. Department of Pathology and Infectious Diseases, The Royal Veterinary College, University of London, North Mymms, UK
20. Busch Gardens, Tampa, Florida
21. Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio
22. VDx Veterinary Diagnostics, Davis, California
23. School of Animal and Veterinary Sciences, Charles Sturt University, Wagga Wagga, New South Wales, Australia
24. Center for Comparative Epidemiology, College of Veterinary Medicine, Michigan State University, East Lansing, Michigan