1. Dignitas International, Zomba, Malawi
2. Division of Infectious Diseases, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada
3. Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
4. Zomba District Health Office, Malawi Ministry of Health, Zomba, Malawi
5. International Union Against Tuberculosis and Lung Disease, Paris, France
6. London School of Hygiene and Tropical Medicine, London, UK
7. Department of Medicine, University of Malawi College of Medicine, Blantyre, Malawi