1. Washington Animal Disease Diagnostic Laboratory and the Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040
2. Iditarod Trail Committee, Wasilla, AK 99687
3. Department of Pathobiology, University of Minnesota, St. Paul, MN 55108
4. Department of Veterinary Diagnostic Investigation, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506-5600