[1] Sunnybrook Hlth Sci Ctr, Dept Microbiol, Toronto, ON M4N 3M5, Canada
[2] Univ Toronto, Dept Lab Med & Pathol, Toronto, ON, Canada
[3] Publ Hlth Agcy Canada, Ottawa, ON, Canada
[4] Natl Microbiol Lab, Winnipeg, MB, Canada
[5] McMaster Univ, Hamilton, ON, Canada
[6] Mt Sinai Hosp, Toronto, ON M5G 1X5, Canada
[7] Univ British Columbia, Vancouver Gen Hosp, Vancouver, BC V5Z 1M9, Canada
[8] Hosp Sick Children, Toronto, ON M5G 1X8, Canada