1. Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta T2N 4N1, Canada
2. Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta T2N 4N1, Canada
3. Department of Medical Microbiology, University Medical Centre, 3584 CX Utrecht, Netherlands
4. Department of Microbiology, Immunology, and Infectious Diseases, University of Calgary, Calgary, Alberta T2N 4N1, Canada