1. Department of Obstetrics and Gynaecology Katutura State Hospital Windhoek Namibia
2. Department of Health Sciences Global Health Unit University Medical Center Groningen Groningen The Netherlands
3. Department of Obstetrics and GynaecologyMedical Center Leeuwarden Leeuwarden The Netherlands
4. Department of Obstetrics and Gynaecology Leiden University Medical Center Leiden The Netherlands
5. Faculty of Science VU UniversityAthena Institute Amsterdam The Netherlands
6. Department of Medicine University Medical Center Hamburg‐Eppendorf Hamburg Germany