1. National Tuberculosis Programme Viet Nam, Hanoi, Viet Nam Association for Tuberculosis and Lung Disease, Hanoi, Viet Nam
2. National Tuberculosis Programme Viet Nam, Hanoi, Centre for Operational Research, International Union Against Tuberculosis and Lung Disease, Paris, France
3. Hanoi Medical University, Hanoi, Viet Nam
4. National Tuberculosis Programme Viet Nam, Hanoi
5. World Health Organization, Global Tuberculosis Programme, Geneva, Switzerland
6. Department of Public Health Sciences, the Karolinska Institute, Stockholm, Sweden