1. Department of Gynecology and Obstetrics; Holbaek Hospital; Holbaek Denmark
2. Department of Obstetrics and Gynecology; The Juliane Marie Centre; University of Copenhagen; Copenhagen Denmark
3. Department of Gynecology and Obstetrics; Aarhus Universty Hospital; Skejby Denmark
4. Department of Gynecology and Obstetrics; Hvidovre Hospital; Hvidovre Denmark
5. Department of Gynecology and Obstetrics; Odense University Hospital; Odense Denmark