1. Department of Microbiology and Immunology, Midwestern University, Glendale, AZ, USA
2. College of Veterinary Medicine, Kansas State University (KSU), Manhattan, KS, USA
3. Department of Microbiology, Immunology and Pathology, Prion Research Center, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, USA
4. US Department of Agriculture, Animal Disease Research Unit, Agricultural Research Service, Pullman, WA, USA
5. Canadian Food Inspection Agency, National and OIE Reference Laboratory for Scrapie and CWD, Ottawa Laboratory Fallowfield, Ottawa, ON, Canada