1. School of Veterinary Medicine, University of California, Davis, CA 95616
2. California Veterinary Diagnostic Laboratory System, University of California, Davis, CA 95616
3. California Department of Food and Agriculture, Animal Health Branch, Sacramento, CA 94271-0001
4. Zoonotic Diseases Laboratory, Livestock and Poultry Institute, BARC-East, ARS, USDA, Beltsville, MD 20705
5. Department of Veterinary Science, East Campus, University of Nebraska, Lincoln, NE 68583-0905