1. Department of Microbiology and Immunology, University of Health and Allied Sciences, Ho PMB 31, Volta Region, Ghana
2. Laboratory Department, Ho Teaching Hospital, Ho P.O. Box MA 374, Volta Region, Ghana
3. Independent Public Health Consultant, 1202 Geneva, Switzerland
4. International Union Against Tuberculosis and Lung Disease, 68 Boulevard Saint Michel, 75006 Paris, France
5. Ghana Country Office, World Health Organization, 7 Ameda Street, Roman Ridge, Accra P.O. Box MB 142, Ghana
6. Luxembourg Operational Research Unit, Operational Centre Brussels, Médecins Sans Frontières, Rue Arbre Benit 46, 1050 Brussels, Belgium
7. Luxembourg Operational Research Unit, Médecins Sans Frontières, 68 Rue de Gasperich, L-1617 Luxembourg, Luxembourg
8. Centre for Evidence-Based Health Care, Division of Epidemiology and Biostatistics, Department of Global Health, Stellenbosch University, Tygerburg 7505, South Africa
9. Department of International Health, Johns Hopkins Bloomberg School of Public Health, 615 North Wolfe Street, Baltimore, MD 21205, USA
10. Sickle Cell Disease Unit, Department of Internal Medicine, Ho Teaching Hospital, Ho P.O. Box MA 374, Volta Region, Ghana