1. a Department of Population Medicine , University of Guelph , Guelph, Ontario, Canada
2. b Foodborne, Waterborne and Zoonotic Infections Division , Centre for Infectious Disease Prevention and Control, Population and Public Health Branch, Public Health Agency of Canada , Ontario, Canada
3. c HPRP Project , University of Guelph , Ontario, Canada
4. d Meteorological Service of Canada, Environment Canada , Toronto, Ontario, Canada
5. e Department of Mathematics and Statistics , University of Guelph , Guelph, Ontario, Canada