1 Medical Department (Operational Research) Médecins Sans Frontières MSF-Luxembourg Brussels Operational Center Luxembourg.
2 Partners in Health Blantyre, Malawi.
3 Initiative (CHAI) Ministry of Health and Social Welfare Monrovia, Liberia.
4 International Union Against Tuberculosis and Lung Disease Paris, France London School of Hygiene & Tropical Medicine London, United Kingdom zachariah@internet. lu.