1. Department of Gynecology and Obstetrics, Lillebaelt Hospital, Kolding, Denmark;
2. Department of Obstetrics and Gynecology, Aarhus University Hospital, Skejby, Denmark;
3. Department of Clinical Microbiology, Lillebaelt Hospital, Vejle, Denmark;
4. Research Unit for Gynecology and Obstetrics, Department of Clinical Research, University of Southern Denmark, Odense, Denmark