1. Veterinary Diagnostic Laboratory, Veterinary Population Medicine Department, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN (Giannitti)
2. National Agricultural Research Institute (INIA), La Estanzuela, Colonia, Uruguay (Giannitti)
3. California Animal Health and Food Safety Laboratory System, School of Veterinary Medicine, University of California, Davis, CA (Giannitti, Anderson, Sverlow)
4. Wyoming State Veterinary Laboratory, University of Wyoming, Laramie, WY (Miller, Vasquez)
5. School of Veterinary Medicine, University of California, Davis, CA (Rowe)