1. Department of Ecosystem and Public Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada;
2. Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada;
3. Cumming School of Medicine, University of Calgary, AB, Canada;
4. School of Public Health, University of Alberta, 3-300 Edmonton Clinic Health Authority, AB, Canada;
5. Department of Geoscience, University of Calgary, Calgary, AB, Canada;
6. Alberta Provincial Laboratory for Public Health, Calgary Laboratory Site, Calgary, AB, Canada