1. Department of Obstetrics and Gynecology Nykøbing Falster Hospital Nykøbing Falster Denmark
2. University of Southern Denmark Odense Denmark
3. Center of Epidemiology, Nykøbing Falster Hospital Nykøbing Falster Denmark
4. Department of Obstetrics and Gynecology Holbæk Hospital Holbæk Denmark
5. Department of Obstetrics and Gynecology Bornholm Hospital Rønne Denmark
6. Department of Obstetrics and Gynecology Zealand University Hospital Roskilde Denmark
7. Department of Endocrinology Slagelse Hospital Slagelse Denmark
8. Department of Surgery Zealand University Hospital Køge Denmark