1. Department of Obstetrics and Gynaecology, University of Dodoma, College of Health Sciences, P.O. Box 395, Dodoma, Tanzania
2. Department of Internal Medicine, University of Dodoma, College of Health Sciences, P.O. Box 395, Dodoma, Tanzania
3. Department of Obstetrics and Gynaecology, Catholic University of Health and Allied Sciences, P.O. Box 1464, Mwanza, Tanzania