1. Department of Veterinary Pathology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
2. Veterinary Laboratory Agency Lasswade, Pentlands Science Park, Bush Loan, Penicuik, Midlothian, United Kingdom
3. Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
4. Prairie Diagnostic Services, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
5. Deep South Animal Clinic, Ogema, Saskatchewan, Canada