1. University of Pretoria; Department of Obstetrics and Gynaecology; Kalafong Hospital Private Bag X396 Pretoria Gauteng South Africa 0001
2. World Health Organization; Department of Reproductive Health and Research; 20 Avenue Appia Geneva Switzerland 1211
3. King's College London; Midwifery, Women and Child Health; Florence Nightingale School of Nursing and Midwifery, James Clerk Maxwell Building 57 Waterloo Road London UK SE1 8WA