1. Department of Obstetrics and Gynaecology; University Teaching Hospital; Lusaka Zambia
2. Department of Obstetrics and Gynaecology; University of Zambia School of Medicine; Lusaka Zambia
3. Department of Obstetrics and Gynecology; University of North Carolina School of Medicine; Chapel Hill NC USA
4. Department of Epidemiology; University of North Carolina Gillings School of Global Public Health; Chapel Hill NC USA
5. Department of Paediatrics; University Teaching Hospital; Lusaka Zambia
6. Department of Paediatrics; University of Zambia School of Medicine; Lusaka Zambia