1. Public Health Research Institute Center, New Jersey Medical School, Rutgers University, Newark, New Jersey, USA
2. Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York, USA
3. Division of Microbiology, Calgary Laboratory Services, Calgary, Alberta, Canada
4. Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, Alberta, Canada
5. Department of Microbiology, Immunology, and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
6. Laboratory of Human Bacterial Pathogenesis, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana, USA