1. Department of Internal Medicine, Bugando Medical Centre/Catholic University of Health and Allied Sciences, Mwanza, Tanzania
2. Department of Microbiology and Immunology, Catholic University of Health and Allied Sciences, Mwanza, Tanzania
3. Kamanga Medics Hospital, Mwanza, Tanzania
4. Oncology Department, Bugando Medical Centre/Catholic University of Health and Allied Sciences, Mwanza, Tanzania