1. School of Nursing and Midwifery, College of Health and Medical Sciences Haramaya University Harar Ethiopia
2. Department of Obstetrics and Gynecology University Medical Center Groningen, University of Groningen Groningen The Netherlands
3. National Perinatal Epidemiology Unit University of Oxford Oxford UK
4. Department of Obstetrics and Gynecology Leiden University Medical Center Leiden The Netherlands
5. Department of Obstetrics and Gynecology Hiwot Fana Specialized University Hospital Harar Ethiopia
6. School of Public Health, College of Health and Medical Sciences, Haramaya University Harar Ethiopia
7. Department of Obstetrics and Gynecology St. Paul's Hospital Millennium Medical College Addis Ababa Ethiopia
8. Center for Women's Health Research University of Newcastle Newcastle New South Wales Australia
9. Department of Health Sciences, Global Health University Medical Center Groningen, University of Groningen The Netherlands
10. Department of Obstetrics and Gynecology Leeuwarden Medical Center Leeuwarden The Netherlands
11. Athena Institute, Vrije Universiteit Amsterdam Amsterdam The Netherlands