1. Archbishop Anthony Mayala School of Nursing, Catholic University of Health and Allied Sciences, Mwanza, Tanzania

2. Department of Community Medicine, Catholic University of Health and Allied Sciences-Bugando, Mwanza, Tanzania

3. Public Health Consultant, Muhimbili University of Health and Allied Sciences (MUHAS), Dar es Salaam, Tanzania

4. Department of Pathology, Catholic University of Health and Allied Sciences Bugando, Mwanza, Tanzania