1. Department of Obstetrics and Gynaecology, Weill Bugando School of Medicine, Catholic University of Health and Allied sciences, Mwanza, Tanzania
2. Department of Microbiology and Immunology, Weill Bugando School of Medicine, Catholic University of Health and Allied Sciences, Mwanza, Tanzania
3. Department of Pathology, Weill Bugando School of Medicine, Catholic University of Health and Allied Sciences, Mwanza, Tanzania
4. Department of Microbiology and Immunology, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania