1. Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Québec, Canada
2. McGill International TB Centre, Montreal, Québec, Canada
3. Provincial TB Services, British Columbia Centre for Disease Control, Vancouver, British Columbia, Canada
4. Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
5. Montreal Chest Institute, Montreal, Québec, Canada