1. Department of Medical Microbiology and Immunology, Faculty of Medicine, Gulu University, P.O. Box 166, Gulu, Uganda
2. School of Medicine, College of Health Sciences, Makerere University, Kampala, Uganda
3. Department of Medical Microbiology and Immunology, Faculty of Medicine, Gulu University, Gulu, Uganda
4. The AIDS Support Organization, Kampala, Uganda
5. The Institute of Clinical Trials and Methodology, University College London, London, UK
6. Department of Rural Development and Agri-Business, Faculty of Agriculture, Gulu University, Gulu, Uganda
7. Department of Pharmacology and Therapeutics, Faculty of Medicine, Gulu University, Gulu, Uganda
8. Department of Reproductive Health, Faculty of Medicine, Gulu University, Gulu, Uganda