[1] BC Ctr Dis Control, Vancouver, BC, Canada
[2] Inst Natl Sante Publ Quebec, Quebec City, PQ, Canada
[3] Ontario Agcy Hlth Protect & Promot, Toronto, ON, Canada
[4] Univ Calgary, Calgary, AB, Canada
[5] Alberta Prov Lab, Calgary, AB, Canada
[6] Univ Laval, CHUQ Res Ctr, Quebec City, PQ, Canada
[7] Publ Hlth Agcy Canada, Natl Microbiol Lab, Winnipeg, MB, Canada