1. Division of Infectious Diseases, Department of Medicine, University of Toronto, Toronto, Canada
2. Microbiology and Virology Laboratory, St. Paul’s Hospital, Providence Health Care, Vancouver, Canada
3. Division of Medical Microbiology, Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, Canada
4. Department of Medical Imaging, Sunnybrook Health Sciences Centre, Toronto, Canada
5. Department of Medical Imaging, University of Toronto, Toronto, Canada