1. Department of Medicine, Cumming School of Medicine, University of Calgary, Pulmonary Diagnostics, South Health Campus, 4448 Front Street SE, Calgary, AB T3M 1M4, Canada
2. Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, CanadaDepartment of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB, Canada
3. Department of Radiology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
4. Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
5. Department of Medicine, University of Alberta, Edmonton, AB, Canada
6. Deptartment of Pathology and Laboratory Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada