1. Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
2. Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
3. Public Health Ontario Laboratory, Toronto, Ontario, Canada
4. National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
5. Communicable Disease Control, Toronto Public Health, Toronto, Ontario, Canada
6. Division of Infectious Diseases, Department of Medicine, University of Toronto, Toronto, Ontario, Canada