[1] Medair, Sudan Country Programme, Ecublens, Sudan
[2] London Sch Hyg & Trop Med, Fac Epidemiol & Populat Hlth, Dept Populat Hlth, London, England
[3] WHO, Hlth Emergencies Programme WHE Dept, Geneva, Switzerland
[4] Univ Ibadan, Fac Pharm, Ibadan, Nigeria
[5] Global Hlth Focus, Kigali, Rwanda