1. Clinical HIV Unit, Ministry of Health, PO Box 30377, Lilongwe, Malawi;
2. Family Health International, Malawi Country Office, Lilongwe, Malawi;
3. London School of Hygiene and Tropical Medicine, Keppel Street, London, UK;
4. Taiwan Medical Mission, Mzuzu Central Hospital, Mzuzu, Malawi;
5. Centres for Disease Control, Lilongwe Office;
6. Lighthouse Clinic, Lilongwe, Malawi;
7. Medecins sans Frontieres-Belgium, Thyolo District Hospital, Thylo, Malawi and
8. Management Sciences for Health, Lilongwe, Malawi