1. Department of Community Medicine, University of Zimbabwe, Harare, Zimbabwe
2. Division of Obstetrics and Gynaecology, Faculty of Medicine, University of Oslo and Rikshospitalet, Oslo, Norway
3. Department of Public Health, Erasmus MC, Rotterdam, The Netherlands
4. Kilimanjaro Christian Medical Centre, Moshi, Tanzania
5. Department of Obstetrics and Gynaecology, University of Zimbabwe, Harare, Zimbabwe
6. Letten Research Centre, University of Oslo, Oslo, Norway