1. Department of Obstetrics and Gynecology Lillebaelt Hospital Kolding Denmark
2. Department of Obstetrics and Gynecology Aabenraa Hospital Aabenraa Denmark
3. Department of Obstetrics and Gynecology Odense University Hospital Odense Denmark
4. Department of Clinical Microbiology Lillebaelt Hospital Vejle Denmark
5. Department of Obstetrics and Gynecology Aarhus University Hospital Denmark
6. Institute of Clinical Medicine, Aarhus University Aarhus Denmark