1. Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
2. Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
3. Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
4. Department of Medicine, Queen’s University, Kingston, Ontario, Canada
5. Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
6. Spatial and Numeric Data Services, University of Calgary, Calgary, Alberta, Canada