1 Centre for Immunization and Respiratory Infectious Diseases, Public Health Agency of Canada, Hamilton, Ontario;
2 Centre for Immunization and Respiratory Infectious Diseases, Public Health Agency of Canada, Hamilton, Ontario; ; McMaster Children's Hospital, Hamilton, Ontario;
3 Centre for Public Health Infrastructure, University of Manitoba, Winnipeg, Manitoba.
4 National Microbiology Laboratory, Public Health Agency of Canada, University of Manitoba, Winnipeg, Manitoba ; Department of Medical Microbiology, University of Manitoba, Winnipeg, Manitoba.