1. Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montréal, Canada.
2. School of Epidemiology and Public Health, University of Ottawa, Ottawa, Canada.
3. Department of Biology, University of Ottawa, Ottawa, Canada.
4. Public Health Risk Sciences Division, National Microbiology Laboratory, Public Health Agency of Canada, Saint-Hyacinthe, Canada.
5. Faculty of Veterinary Medicine, University of Montréal, Saint-Hyacinthe, Canada.