1. Department of Microbiology and Immunology, College of Graduate Studies, Midwestern University , Glendale, AZ, USA
2. Prion Research Center, Department of Microbiology, Immunology, and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University , Fort Collins, CO, USA
3. Colorado Department of Agriculture Animal Health Division , Broomfield, CO, USA
4. National Veterinary Services Laboratories, United States Department of Agriculture, APHIS, VS , Ames, IA, USA
5. Center for Veterinary Biologics, United States Department of Agriculture, APHIS, VS , Ames, IA, USA