1. Department of Clinical Pharmacology, Weill Bugando School of Medicine, P.O. Box 1464, Mwanza, Tanzania
2. Microbiology and Immunology Department, Weill Bugando School of Medicine, P.O. Box 1464, Mwanza, Tanzania
3. Department of Community Medicine, School of Public Health, Catholic University of Health and Allied Sciences, P.O. Box 1464, Mwanza, Tanzania
4. Department of Pharmacology, Mbarara University of Science and Technology, P.O. Box 1410, Mbarara, Uganda
5. National Institute for Medical Research, P.O. Box 1462, Mwanza, Tanzania