1. Division of Infectious Diseases, G. F. Strong Research Laboratories and the Canadian Bacterial Diseases Network, Vancouver, BC, Canada
2. Vancouver Hospital Health Sciences Centre, 2733 Heather Street, Vancouver, BC, Canada
3. Departments of Medicine and Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
4. Departments of Medicine, University of British Columbia, Vancouver, BC, Canada
5. Department of Chemistry, University of Alberta, Edmonton, AB, Canada