1. Woolcock Institute of Medical Research, Hanoi, Viet Nam, South Western Sydney Clinical School, University of New South Wales, Sydney, University of Sydney, Sydney, New South Wales, Australia
2. National Lung Hospital, Hanoi, National TB Control Programme, Hanoi, Viet Nam
3. Woolcock Institute of Medical Research, Hanoi, Viet Nam, University of Sydney, Sydney, New South Wales, Australia
4. National Lung Hospital, Hanoi, National TB Control Programme, Hanoi, Viet Nam, Centre for Operational Research, International Union Against Tuberculosis and Lung Disease, Paris, France
5. National TB Control Programme, Hanoi, Viet Nam, Centre for Social Disease Control, Ca Mau, Viet Nam
6. Woolcock Institute of Medical Research, Hanoi, Viet Nam
7. Woolcock Institute of Medical Research, Hanoi, Viet Nam, South Western Sydney Clinical School, University of New South Wales, Sydney