1. a Department of Obstetrics and Gynaecology, Faculty of Medicine , Makerere University , Kampala , Uganda
2. b Department of Medicine, Faculty of Medicine , Makerere University , Kampala , Uganda
3. c Research Department, Malaria Consortium Africa , COMDIS , Kampala , Uganda
4. d Clinical Epidemiology Unit , Faculty of Medicine, Makerere University , Kampala , Uganda