1. Department of Comparative Biology and Experimental Medicine Faculty of Veterinary Medicine University of Calgary Calgary AB Canada
2. National and OIE Reference Laboratory for Scrapie and CWD Ottawa Laboratory Fallowfield Canadian Food Inspection Agency Ottawa ON Canada
3. Ross University School of Veterinary Medicine Basseterre St. Kitts
4. Department of Biology University of Saskatchewan Saskatoon SK Canada
5. Department of Biology Carleton University Ottawa ON Canada