1. Department of Veterinary Microbiology, University of Saskatchewan, Saskatoon, Canada.
2. Schneider Institutes for Health Policy, Heller School, Brandeis University, Waltham, Massachusetts.
3. School of Public Health, University of Saskatchewan, Saskatoon, Canada.
4. Department of Community Health and Epidemiology, University of Saskatchewan, Saskatoon Health Region, Saskatoon, Canada.