1. Research Group on Epidemiology of Zoonoses and Public Health, Faculty of Veterinary Medicine, Université de Montréal, 3200 Sicoitte, Saint-Hyacinthe, J2S 2M2, Quebec, Canada.
2. Department of Pathobiology and Population Sciences, Royal Veterinary College, London, England.
3. Public Health Agency of Canada, Guelph, Canada.
4. SAFOSO AG, Liebefeld, Switzerland.
5. Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Canada.