1. Department of Medicine, University of Calgary, Calgary, Alberta, Canada
2. Calgary Laboratory Services, Calgary, Alberta, Canada
3. Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, Alberta, Canada
4. Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
5. Department of Medical Microbiology, University of Pretoria, Pretoria, Gauteng, South Africa
6. Snyder Institute for Chronic Disease, University of Calgary, Calgary, Alberta, Canada