1. Department of Pathology and Laboratory Medicine, Division of Microbiology, Nova Scotia Health, Halifax, Nova Scotia, Canada
2. Department of Pathology, Dalhousie University, Halifax, Nova Scotia, Canada
3. Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada
4. Department of Microbiology and Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
5. Praxes Medical Group, Halifax, Nova Scotia, Canada