1. Department of Community Medicine, University of Alberta, Edmonton, Alberta;, Canada
2. Department of General Surgery, Lake of the Woods District Hospital, Kenora, Ontario, Canada
3. Department of Pathology, Lake of the Woods District Hospital, Kenora, Ontario, Canada
4. National Centre for Streptococcus, Provincial Laboratory of Alberta, Edmonton, Alberta, Canada
5. Section of Infectious Diseases, Department of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada