1. Department of Obstetrics and Gynaecology; University Hospitals of Leicester; Leicester UK
2. Department of Obstetrics and Gynaecology; University Hospitals of North Midlands; Stoke-on-Trent UK
3. Walter Sisulu University, University of Fort Hare, University of the Witwatersrand, Eastern Cape Department of Health, East London, South Africa & Department of Obstetrics and Gynaecology, University of Botswana; Gaborone Botswana
4. SAMRC Maternal and Infant Health Care Strategies Unit/University of Pretoria; Pretoria South Africa
5. Keele University & Department of Obstetrics and Gynaecology, University Hospitals of North Midlands; Stoke-on-Trent UK