1. HIV and AIDS Department, Ministry of Health, Lilongwe, Malawi.
2. International Union against Tuberculosis and Lung Disease, 68 Boulevard Saint Michel, 75006 Paris, France.
3. Management Sciences for Health, Lilongwe, Malawi.
4. Independent public health consultant, Lilongwe, Malawi.
5. Department of HIV and Hepatitis, World Health Organization, Geneva, Switzerland.
6. Special Programme for Research and Training in Tropical Diseases, World Health Organization, Geneva, Switzerland.