1. International Union Against Tuberculosis and Lung Disease, Paris, France, Department of Clinical Research, Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK
2. International Union Against Tuberculosis and Lung Disease, Paris, France, Ministry of Health and Child Care, AIDS and TB Department, Harare, Zimbabwe
3. Ministry of Health and Child Care, AIDS and TB Department, Harare, Zimbabwe