Members of the Canadian Nosocomial Infection Surveillance Program who participated in this study: Elizabeth Bryce, Vancouver General Hospital, Vancouver, BC; Joanne Embree, Health Sciences Centre, Winnipeg, MB; Sarah Forgie, Stollery Children's Hospital, Edmonton, AB; Lynn Johnston, Queen Elizabeth II Health Sciences Centre, Halifax, NS; Kevin Katz, North York General Hospital, Toronto, ON; Allison McGeer, Mount Sinai Hospital, Toronto, ON; Dorothy Moore, Montréal Children's Hospital, McGill University Health Centre, Montréal, QC; Virginia Roth, The Ottawa Hospital, Ottawa, ON; Andrew Simor, Sunnybrook Health Sciences Centre, Toronto, ON; Kathryn Suh, The Ottawa Hospital, Ottawa, ON; Geoffrey Taylor, University of Alberta Hospital, Edmonton, AB; Mary Vearncombe, Sunnybrook Health Sciences Centre, Toronto, ON.
Conflicts of interest: None to report..