1. Department of Gynecology and Obstetrics Odense University Hospital Odense Denmark
2. Department of Clinical Research University of Southern Denmark Odense Denmark
3. Department of Obstetrics and Gynecology Kilimanjaro Christian Medical Center Moshi Tanzania
4. Department of Preventive Medicine and Public Health Faculty of Medicine University of Granada CIBER of Epidemiology and Public Health (CIBERESP) Granada Spain
5. Department of Public Health University of Southern Denmark Esbjerg Denmark