1. Division of Infectious Diseases, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
2. Alberta Health Services, Edmonton, Alberta, Canada
3. Division of Infectious Diseases, McMaster University, Hamilton, Ontario, Canada
4. Centre for Communicable Diseases and Infection Control, Public Health Agency of Canada, Ottawa, Ontario, Canada
5. Division of Infectious Diseases, McGill University Health Centre, Montreal, Quebec, Canada
6. Division of Infectious Diseases, QEII Health Sciences Centre, Halifax, Nova Scotia, Canada
7. Hamilton Health Sciences, Hamilton, Ontario, Canada
8. Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada