1. 1British Columbia Centre for Disease Control, Vancouver, British Columbia, Canada
2. 2Health Canada, Ottawa, Ontario, Canada
3. 3Canadian Food Inspection Agency, Ottawa, Ontario, Canada
4. 4British Columbia Centre for Disease Control Public Health Microbiology and Reference Laboratory, Vancouver, British Columbia, Canada
5. 5Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
6. 6Vancouver Coastal Health Authority, Vancouver, British Columbia, Canada
7. 7Fraser Health Authority, Surrey, British Columbia, Canada
8. 8Vancouver Island Health Authority, Victoria, British Columbia, Canada
9. 9Canadian Food Inspection Agency, Burnaby, British Columbia, Canada