1. Department of Obstetrics & Gynaecology, Katutura State Hospital, PO Box 86237, Eros, Windhoek, Namibia.
2. Department of Obstetrics & Gynaecology, University of North Carolina, North Carolina, United States of America.
3. Department of Health Science, Global Health, University Medical Center Groningen, Groningen, Netherlands.
4. Department of Obstetrics, Leiden University Medical Center, Leiden, Netherlands.
5. Department of Obstetrics & Gynaecology, University of Namibia, Windhoek, Namibia.