1 Tuberculosis Program Evaluation and Research Unit, Department of Medicine, University of Alberta, Edmonton AB, Canada.
2 Division of Pulmonary Medicine, Department of Medicine, University of Alberta, Edmonton, AB, Canada.
3 Tuberculosis Program Evaluation and Research Unit, Department of Medicine, University of Alberta, Edmonton AB, Canada, Division of Pulmonary Medicine, Department of Medicine, University of Alberta, Edmonton, AB, Canada, School of Public Health, University of Alberta, Edmonton, AB, Canada.