1. Department of Medical Microbiology and Immunology, University of Alberta, Edmonton, Alberta, CanadaT6G 2J23
2. Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, CanadaT6G 2J22
3. National Centre for Streptococcus, Provincial Laboratory for Public Health (Microbiology), Edmonton, Alberta, CanadaT6G 2J21