S. Aleina Tweed* , Danuta M. Skowronski*, Samara T. David†, Andrew Larder‡, Martin Petric*, Wayne Lees§, Yan Li¶, Jacqueline Katz#, Mel Krajden*, Raymond Tellier**, Christine Halpert‡, Martin Hirst††, Caroline Astell††, David Lawrence*, and Annie Mak*

Author affiliations: *British Columbia Centre for Disease Control, Vancouver, British Columbia, Canada; †Health Canada Field Epidemiology Training Program, Ottawa, Ontario, Canada; ‡Fraser Health Authority, Abbotsford, British Columbia, Canada; §Canadian Food Inspection Agency, Ottawa, Ontario, Canada; ¶National Microbiology Laboratory, Winnipeg, Manitoba, Canada; #Centers for Disease Control and Prevention, Atlanta, Georgia, USA; **Hospital for Sick Children, Toronto, Ontario, Canada; ††British Columbia Cancer Agency Genome Sciences Centre, Vancouver, British Columbia, Canada