1. Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa
2. National Programme for Tuberculosis and Pulmonary Diseases, Cotonou, Benin
3. Service de Pneumo-Phtisiologie, Hopital Ignace Deen, Conakry, Guinea
4. London School of Hygiene & Tropical Medicine, London, UK
5. UNICEF/UNDP/World Bank/WHO Special Programme on Research and Training in Tropical Diseases (TDR), Geneva, Switzerland